effect of blade angle

Eng. This piece of tape was about 1inche wide and 20 inches long. As a result, the effects of the blade outlet angle on both the radial thrust and the modeled components were clarified. The internal flow field in the magnetic drive pump is analyzed with the numerical calculation method. Wind energy is a favorable alternative to conventional fuels for providing clean and cheap energy. Chua, J. Li, K.L. Integration of flexible ac transmission systems (FACTS) devices is a solution to overcome that problem, though it definitely increases the overall cost. The “shading effect” is avoided by introducing the “blank space” among blades, which is adjusted by changing the blade size. This paper presents the effect of blade angles on the packing characteristic curves of a small cooling tower on the site experimental data. The data are used to determine how the blade angle must change with wind speed to maintain a constant turbine rotational speed. 4a, for the case of two active vortices, the reacting flow is well developed in the center region. Park, Non-premixed lean flame characteristics depending on air hole positions in a baffled micro combustor. Instead of using electricity to make wind, like a fan, wind turbines use wind to make electricity. At the pitch angle of 15 degree the PVC wind turbine model showed the best performance. Based on the hypothesis above, a series of experiments were designed to understand the effect of blade type on print quality and deflection/attack angle. As can be seen, the present result is in good agreement with the experimental data. Nevertheless, it must be noted that the surface roughness effect on a blade's boundary layer is dependent on the blade Reynolds number, which varies with the rotational speed and azimuth angle. pollution(KhanRahman and Alam, 2004). Spera, D.A. The aim of this paper is to study the effect of blade installation angle on the power coefficient of a five-blade resistance type VAWT, so as to improve its performance. Solar radiation resources have been assessed from other meteorological parameters like sunshine duration and cloud cover as measured radiation data were not available at the site. The range of operating condition was (2 to 5.6 m/s wind speed), (10% to 100% of electrical load that is applied on the terminals of the electrical generator) and (10° to 80° blades angle of the wind-turbine). The effect of wind velocity on the rotation of the rotor is clear, as the wind velocity increases the rotor rotation also increases. Fixed speed wind generators suffer greatly from meeting the requirements of new wind farm grid code, because they are largely dependent on reactive power. The variation of the blade angle makes the two-vortex structure in the micro combustor. And, there is no wall vortices unlike the baffled combustor of Kim and Park [9, 10]. However, a pair of two vortices is generated in the center region near the fan swirler. The conjugated heat transfer is considered for the fan swirler and combustor wall. All convergence criterions for the governing equations are set to be 10−6. The shortest flame is observed at θ ≈ 10º. If blade angle slots have a positive angle (such as 30 degrees) between the rotation axis and slots, inverse blade angle slots have the negative angle (such as −30 degrees). volume 1, pages65–71(2019)Cite this article. Based on such results, the final grid is set to the resolution of 900,000 CVs for further simulations. To see the geometrical effect of the micro fan on the reacting flows, six blade angles are examined. A piece of duct tape was wrapped around the outside of the generator. Energy 88, 1–16 (2011), Y.A. It is commonly stated that "the steeper the blade pitch, the more air a fan will move" or "a good fan will have a blade pitch of 14 degrees or more". From this result, we know that the fan swirler becomes an effective tool to change the recirculating flow patterns in the micro combustor. All figure content in this area was uploaded by Md Khairul Alam, All content in this area was uploaded by Md Khairul Alam on Feb 19, 2015, Dhaka University of Engineering & Technology. The hypothesis that pressure losses in a curved duct andin an impeller passage behave similarly is suggested and found inadequate. Al-Abdeli, A.R. Wahid, Vortex combustion and heat transfer in meso-scale with thermal recuperation. As the blade angle increases, the rapid temperature rise at the centerline is obtained for θ ≤ 15º, but the temperature rise is reduced for θ > 15º. That is, conditions of fuel-lean and fuel-rich are created regionally. The wall material is treated as the stainless steel [9, 10]. Therm. So, to examine the geometric effect of fan swirler on the combustion characteristics, reacting flows depending on six blade angles are numerically investigated. Kim, T.S. This study was divided into two parts to address the above mentioned two effects; 1. Bangladesh is endowed with plentiful supply of renewable sources of energy. However, there are some windy locations in which wind energy projects could be feasible. In order to find the corresponding handle orientation, it is recommended to place the top of the razor against the cheek with the handle being perpendicular to the surface of the skin, then lowering the handle until the blade just touches the skin. Eldrainy, K.M. In this paper, the performance of a six blades axial type wind turbine has been studied experimentally to estimate the wind power, the electrical generated power and-the modified power-coefficient of the wind-turbine. The design of a rotary lawn mower has been told in the journal Design and Analysis of Rotary Lawn Mower by various authors[1]. It is expected that the wall recirculations are reduced with a moderate center recirculation. The speed of cutting blade, angle and sail are some of the factors influencing the quality of cut. https://doi.org/10.1007/s42791-019-0002-4, DOI: https://doi.org/10.1007/s42791-019-0002-4, Over 10 million scientific documents at your fingertips, Not logged in Wind energy is becoming more acceptable alternative to face the global energy crisis as well as the environmental issues. Eng. According to Kim and Park [9], in the baffled micro combustor, large center vortex gives short flame length and high combustion efficiency, but the combustor displays the increased wall heat transfer. Out of the various renewable sources, solar and biomass and to a limited extend, wind and hydro-power are effectively used. Therefore, for θ = 45º, 75º, more incomplete mixing state of fuel–air is obtained and the flame is stretched to the streamwise direction. The effect of the blade arc angle on the turbine’s torque and power performance was studied. Wind energy, which is widely used as an alternative to fossil fuels, can also be exploited with small scale wind turbines when the availability of, The objective of the present study is to perform a risk-based life-cycle assessment of monopile offshore wind turbine support structures. The effect of the blade arc angle on the turbine’s torque and power performance was studied. The SIMPLEC algorithm for pressure–velocity coupling and the second-order upwind scheme for convection terms are used [11]. Paul Sellers on 7 April 2013 at 3:16 am. The design of elements like bevel gear, v belt drive, ball bearing, mower frame and wheel mount has been done in the aforementioned. 1a. As the blade angle increases, the vortex moves to the center region. Page 2 Summary My R&D was to figure out if the helicopter blades on a 4.5 PVC pipe worked better than a helicopter blades on a 1-inch PVC pipe. © 2020 Springer Nature Switzerland AG. Figure 5 represents the combustible region in the range of ϕlocal= 0.45–1.6 (based on the flammability of premixed methane-air combustion [13]) with temperature contours. Technol. As shown in Fig. My question on blade sharpening is, How does these newer grades of steel used in the blades effect the angle of sharpening. I am been working on an EEI. 4. The computational domain of present micro combustor and various fan swirler designs are plotted in Fig. A pre-feasibility of wind-PV-battery hybrid system has been performed for a small community in the east-southern part of Bangladesh. Homework Statement Hi all! From the results of various conditions, they showed that the wall heat flux increases as the wavy pattern of flame structure is severe [10]. The angle of attack is still small The PVC pipe has been seated well into the fittings by tapping together with a hammer. It is often stated that a good blade angle to start out with is about 30 degrees (relative to the skin). To see the geometrical effect of the micro fan on the reacting flows, six blade angles are examined. Depending on the blade angle, the variations of temperature and CH4 mass fraction are clear. Suitable control strategy is developed in this paper for the multilevel frequency converter of VSWT-PMSG. This can be readily observed in Fig. Appl. The design of the structure is based on the optimised levelised cost of energy so that the offshore wind energy can compete with the other energy resources. The predicted results showed that increasing the wind speed and-the blades angle of the wind-turbine will increase the generated power from the wind-turbine. Risk-based life-cycle assessment of offshore wind turbine support structures accounting for economic... Wind flow modelling and wind farm layout optimisation. In the present study, the performance of two small scale wind turbines to be installed at Incek region, where there is a low average wind speed, is investigated. These changes in reaction zone and temperature profile are closely linked to the change of vortical flows. Aly, M.N.M. the results of the numerical prediction of the H-Q curves for the examined impellers, which are shown in Fig. Snake the motor wires through down the tower and through the hole that was drilled in the PVC tee at the base of the wind turbine and attached the nacelle to the top of the tower. Finally, the effects of ply angle and non-conservative compressive force on the vibration and stability of rotating composite blades are investigated. The present combustor has a feature of the combustor with swirling inlet. Heat Mass Transf. Choi, K. Nakabe, K. Suzuki, Y. Katsumoto. This is a bad factor for the micro combustor for energy generation. But, there is no traceable pattern. The circumferential development is very sensitive to the variation of fan geometry. As the swirling flow strength gets stronger, i.e. As the blade angle increases, the rapid temperature rise at the centerline is obtained for θ ≤ 15º, but the temperature rise is reduced for θ > 15º. The risk-based assessment is performed for the design solutions aiming to achieve the minimum of the levelised cost of energy and the total expected cost conditional to the implemented inspection strategy and the structural risk. A centrifugal compressor with three different shrouded 2D impellers is studied numerically. Fanyu and Chen Hao[8] researched effects of blade inlet angle on performance of pump as turbine, the results show that with the increase of blade inlet angle, its efficiency decreases at small flow rate and increases at large flow. Up to now, many efforts have been devoted to get an efficient micro combustor. Introduce the bottom of the PVC tower into the tee at the center of the turbine base. Arranged the pieces like the image to the right and then pushed them together to form a solid piece. blade angle to decrease the RPM. The Effect of Blade Curvature and Angle-of-Attack on Helicopter Descent Ashley Van Milligan NAR#93487 R&D Event, NARAM 57 July 26, 2015. Comparison of local equivalence ratio (left) and temperature (right) for several axial locations. Therefore, even though the difference in Tmax between θ ≈ 10º and θ ≈ 15º is minor, the difference between combustion efficiencies becomes 7.5%. As the bladed angle increases, Tmax and η are in the range of 2005–2140 K, 0.74–0.98, respectively. Appl. 3b of the OH radical contours of x–y plane. So, the interval of 5° is selected for 0°–20° and the angle interval is set to be large for the other range. However, it is very difficult for most of small scale combustors because of the inefficient mixing problem [1,2,3,4]. The primary source of energy is fossil fuel, however the finiteness of fossil fuel reserves and large scale environment degradation caused by their widespread use, particularly global warming urban air pollution and acid rain, strongly suggests that harnessing of non-conventional renewable and environment friendly energy resources is vital for steering the global energy supplies towards a sustainable path. It is very interesting that the fastest temperature rise is shown when θ ≈ 10º. Comparison of Tmax and combustion efficiency. 7 shows the averaged wall temperature and the heat loss ratio for different blade angles. In this study, the effect of the number of blades (z=5, 6 and 7), blade discharge angles (β2b=25 and β2b=35 ) and splitter blade lengths (40, 55, 70, and 85% of the main blade length) on DWP performance has been studied experimentally. The same behavior of the generated power from the wind-turbine for different wind velocity is illustrated in figure (7-b), Climate change and global warming have increased the awareness of mankind in protecting the world. Appl. Blade pitch is the angle at which the blades are set relative to parallel to the ground. This represents a flame zone. Therm. Chou, K.J. Based on the experts’ opinions, the obtained results by this way are evaluated from technical, economic, environmental and customer attributes by AHP. Join ResearchGate to find the people and research you need to help your work. The turbine is used to test how varying the blade angle affects the turbine’s rotational speed at different wind speeds. - 37.187.147.154. Effect of blade pitch angle on the aerodynamic characteristics of a twisted blade horizontal axis wind turbine based on numerical simulations. Figure 2b shows the centerline temperature profile for fan blade angle of θ ≈ 10º. As the blade angle increases, the rapid temperature rise at the centerline is obtained for θ ≤ 15º, but the temperature rise is reduced for θ > 15º. It is difficult to combine two design directions into a system, because each combustor is designed to maximize one kind of advantage. Two different turbulence models, Chien's k- and k- SST, are compared. The selection of the best turbine from several of different turbine brands is complicated task since a few decision criteria need to be noted simultaneously. 2. The blade length and rotating speed are denoted by L and Ω b respectively. It is found that it's not recommended to operate the wind-turbine at (80°) blades angle associated with a wind speed range that is above (3.8 m/s) due to a high level of wind-turbine vibration. To check this difference, the streamlines of x–y plane near the fan swirler are plotted in Fig. Due to the development of strong vortices, the flame zone is more stretched to downstream. Thus, three kinds of inverse blade angle slots CT (IBSCT) were designed and investigated on a transonic axial flow compressor with the unsteady calculated method. This study was conducted under different operating conditions assuming steady-state, incompressible and isothermal air flow through the wind-turbine. Figure 2 shows the tower, nacelle it holds the DC generator, blades and other, top of the tower. In this study, the selected turbines are investigated in detail. As seen, the heated inner wall region is well matched to the variation of flame characteristics in Fig. Both optimal design solutions for a monopile support structure and the optimal inspection planning are, The increased scarcity of fossil fuels and heightened awareness of anthropogenic climate change have catalysed investment in sustainable forms of power generation, such as wind, hydro, and geothermal. 176, 645–665 (2004), S.R. Google Scholar, W.M. As a conclusion, Finn Wind Tuule C 200 wind turbine, which is the best performer, generates a yearly average power of 321.82 (W), while in winter, the seasonal average power value reaches 401.35 (W). A propeller blade's "lift", or its thrust, depends on the angle of attack combined with its speed. From a closer inspection of Figs. At the inlet, the turbulent kinetic energy is 1.5 (0.04Uc)2 and the Reynolds stresses are obtained from the isotropic relation. Herein, the heat loss ratio (qloss) is defined as \(\sum {q_{i} A_{i} } /\dot{m}_{{CH_{4} }}^{inlet} LHV\). Under the ‘Rural Electrification and Renewable Energy Development (RERED) Programme’ a total of 64,000 SHSs will be installed by 2007. Measured wind speed at the site varies from 3 m/s to 5 m/s. Li, W.M. VSWT-PMSG uses a fully controlled frequency converter for grid interfacing and it has abilities to control its reactive power as well as to provide maximum power to the grid. 70 (Springer, Dordrecht, 2002), pp. Kim and Park [9] detailedly discussed the heat transfer characteristics based on the variations of vortical flows in the micro combustor with a multi-hole baffle for MGT-SOFC (solid oxide fuel cell) hybrid system. It is because the reaction zone is anchored more upstream and the flame length is largely reduced, as the blade angle approaches to θ = 15º. Hosseini, M.A. Finally, a mixed integer programming (MIP) model is developed which aims to maximize the net revenue from the wind farm, accounting for energy yield, turbine installations costs, transmission costs, turbine wake, turbine noise, and turbulence. Appl. The Effect of Blade Curvature and Angle-of-Attack on Helicopter Descent Ashley Van Milligan NAR#93487 R&D Event, NARAM 57 July 26, 2015. Despite the various usefulness, but such study has been scarcely attempted for the application to a micro combustor. Park, Effects of noncircular air holes on reacting flow characteristics in a micro can combustor with a seven-hole baffle. In this paper, AHP method is utilized on the decision of selection for the, Energy need of mankind has generally been met using fossil fuels until near past. We find that the positive peak torque on the blade can be increased by reducing the blade ellipticity, while the negative peak torque is on the contrary. Blade pitch is the angle at which the blades are set relative to parallel to the ground. The hybrid system analysis has showed that for a small community consuming 53,317 kWh/year the cost energy is 0.47USD/kWh with 10% annual capacity of shortage and produces 89,151 kWh/year in which 53% electricity comes from wind and the remaining from solar energy. 64, 3282–3289 (2009), Article  Chou, W.M. 36, 936–941 (2009), M. Khaleghi, S.E. The first step is done by studying the effect of inlet blade angle of 90° and analyzing the results by using the CFD analysis. In recognition of these mechanical challenges and financial incentives, this thesis develops a wind flow model using CFD software, which provides a three dimensional and non-linear insight into wind flow. Int. Fanyu and Chen Hao researched effects of blade inlet angle on performance of pump as turbine, the results show that with the increase of blade inlet angle, its efficiency decreases at small flow rate and increases at large flow. As a result, the heat loss related to the increased heat flux is increased. Blade Deflection Test To see the wall heat transfer characteristics, Fig. The vortices inside a micro combustor [4,5,6,7,8,9,10] is divided into two patterns near the combustor center and the chamber wall. These are sharpened to an angle which is roughly 7 to 8 degrees (although the back of the blade is used as a guide so knowing the angle isn’t important and it is not adjustable). 90° PVC fittings, PVC tees and 6 inches PVC. Sci. Iso-surface of Z = 0.055 overlapping the streamlines and temperature contours with streamlines of x–y plane. As can be seen in Fig. The turbine generates a yearly total of 2819.14 (kWh) energy, which covers the entire yearly electrical energy need of a household in Turkey. The structural assessment of the monopile support structures is carried out using the finite element method accounting for the pile-soil interactions. The CFD results show shock losses and vortices behind each blade at the inlet flow regions. Weibull parameters calculated for the region in a previous study of the authors are also used along with turbines' characteristics in the calculation of seasonal and yearly average power generation of the turbines. other parameters such as pump casing, blade inlet and outlet angles, blade thickness, impeller inlet and outlet diameters, were kept the same. The predicted monthly averaged daily global radiation over Chittagong is 4.36 kWh/m2/day. The present study analyses a multi-dimensional framework, which integrates structural configuration of the support structure, manufacturing, detailed structural risk assessment, inspection and repair planning, and economic conditions into a coupled dynamic system accounting for the feedback loops resulted from the introduction of the probabilistic structural state to the life cost expenditure such as CAPEX, OPEX, and DECEX. A special flame is observed for θ ≈ 10°. Wind turbine technology. When we consider the fundamental relationship of impeller work, using Euler’s turbomachinery equation for specific work (Figure 1), we can see how the impeller blade exit angle has a direct impact on the impeller work through changes in the impeller exit absolute tangential velocity, C Ɵ2. Figure 3 shows rotor and hub. Let me say this. Due to the flame anchoring effect, the high temperature zone is formed near the chamber wall. Combustion characteristics of the micro combustor with a swirler of micro fan type are numerically investigated. As the grid becomes dense, the temperature profile gets closer to a unique distribution. The case of θ ≈ 10º gives the best performance. The outlet sets to a constant pressure. The popular one is to make vortices induced by bluff bodies and geometrical variations in the micro combustor [3], because the vortical flows improve the combustion efficiency and stable flame structure. So, this mixing state is measured by using the local equivalence ratio (ϕlocal) which is defined as ϕlocal= (Z−ZZst)/(Zst−ZstZ). The modified Savonius rotor is constructed with an overlap ratio 0.0, and a blade arc angle 90°. Page 2 Summary My R&D was to figure out if the helicopter blades on a 4.5 PVC pipe worked better than a helicopter blades on a 1-inch PVC pipe. A hook angle can be thought of as the angle at which the tip enters the material. Uniform mass flow rates of fuel and air side are assigned to the inlets and the inlet temperatures are 300 K. The Reynolds number based on the fuel hole diameter (Df) is 3000. Noticeable differences in efficiency are observed. My answer does not relate to variable-pitch blades, as used on utility-scale wind turbines. The noticeable point which comes out of the experimental investigation on PVC wind turbine model is that there is no homogeneous trend of voltage and power increase with the increase in pitch angle. The blade outlet angle of research on the influence of radial force in the centrifugal pump is less, so the effect of different blade outlet angles on radial force of the marine pump is necessary for research. The effects of blade inclination on tangential and axial forces are first discussed and then the overall rotor torque is considered as a function of azimuthal position of the blades. Moreover, dynamic performance of the system is also evaluated using real wind speed data. Appl. The assumption of the no-slip boundary and zero fluxes of species are adopted for the inner wall of the combustor. Meanwhile larger and more expensive wind turbines have created large financial incentives to optimize the positions of turbines to generate the most energy. The main objective of this work is to study the effect of blade angle variations on the cavitation phenomenon in axial pump with specific interest in cavity geometry, pressure and void fraction fields. Figure 1 shows the schematic view of the present micro combustor. The wind turns the blades, which spin a shaft, which connects to a generator and makes electricity. Study the Effect of Blade Angles on the Performance of Axial Six Blades Wind Turbine, WIND ENERGY IN BANGLADESH: PROSPECTS AND UTILIZATION INITIATIVES, A Variable Speed Wind Turbine Control Strategy to Meet Wind Farm Grid Code Requirements, Prospect of wind–PV-battery hybrid power system as an alternative to grid extension in Bangladesh, Effective renewable energy activities in Bangladesh, Fluid Mechanics and Thermodynamics of Turbomachinery, Wind turbine technology : fundamental concepts of wind turbine engineering / editor David A. Spera, Multi-criteria decision making for 1.5 MW wind turbine selection, Performance of Small Scale Wind Turbines at Incek Region - Ankara. The two sides of the PVC turbine base was constructed, pipe sections construct. For a non-premixed micro combustor, the local equivalence ratio becomes ϕlocal= ϕinlet when the fuel and air is becoming perfectly mixed. The mechanism of how the blade arc angle affects the turbine performance was explained with field contours. Figure 3a shows profiles of the centerline temperature and fuel mass fraction depending on the blade angle of the fan swirler. So far, a total of 37,000 SHSs with a capacity of about 2.5 MWp have been installed in the country. Although vortices are always present around the edge of the rotor disk, under certain airflow conditions, they will intensify and, coupled with a stall spreading outward from the blade root, result in a sudden loss of rotor thrust. Eng. Since the tangential velocity of angular momentum is directly influenced by the blade angle, the creation of vortical flow structure affecting the fuel–air mixing is significantly varied by the fan blade angle. That is, it takes the benefit of the baffled combustor and weakens the wall heat transfer. Yang, D.Y. The first thing that I did was I soaked the blades in ammonia/water and then I taped the blades to the PVC … A straight razor has a … And since, blowing in the wind(Nandi and Ghosh, 2010, more energy. To check the grid dependence for the present micro combustor, three control volumes (CVs) of 300,000, 600,000, 900,000 are selected. Effects of blade angle on combustion characteristics in a micro combustor with a swirler of micro fan type, $$\frac{{\partial \left( {\rho U_{i} } \right)}}{{\partial x_{i} }} = 0$$, $$\frac{{\partial \left( {\rho U_{i} U_{j} } \right)}}{{\partial x_{j} }} = - \frac{\partial P}{{\partial x_{i} }} + \frac{\partial }{{\partial x_{j} }}\left( {\mu \frac{{\partial U_{i} }}{{\partial x_{j} }} - \rho \overline{{u_{i}^{'} u_{j}^{'} }} } \right)$$, $$\frac{\partial }{{\partial x_{k} }}\left( {\rho U_{k} \overline{{u_{{_{i} }}^{'} u_{{_{j} }}^{'} }} } \right) = D_{ij} + P_{ij} + \phi_{ij} + \varepsilon_{ij} + F_{ij}$$, $$\frac{{\partial \left( {\rho U_{j} h} \right)}}{{\partial x_{j} }} = \sum\limits_{j} {\left[ {\frac{\partial }{{\partial x_{i} }}\left( {\rho h_{j} D_{j,m} \frac{{\partial Y_{j} }}{{\partial x_{i} }}} \right)} \right]} + \frac{\partial }{{\partial x_{i} }}\left( {k_{f} \frac{\partial T}{{\partial x_{i} }}} \right)$$, $$\frac{\partial }{{\partial x_{j} }}\left( {U_{j} Y_{i} } \right) = \frac{\partial }{{\partial x_{j} }}\left( {D_{i,m} + \frac{{\nu_{t} }}{{Sc_{t} }}} \right)\nabla Y_{i}$$, \(\dot{m}_{{CH_{4} }}^{inlet} /\dot{m}_{{CH_{4} }}^{outlet}\), \(\sum {q_{i} A_{i} } /\dot{m}_{{CH_{4} }}^{inlet} LHV\), https://doi.org/10.1007/s42791-019-0002-4. Kim, W.H., Park, T.S. Yang, A potential heat source for the micro-thermophotovoltaic (TPV) system. Hexahedral meshes were … Problem Statement. By this background, various fans are tested for the micro combustor and combustion characteristics are discussed. J. Hydrogen Energy 37, 9576–9583 (2012), S.K. So, a micro fan is introduced to make swirl flows. For few months and hours the speed is below the cut in speeds of the available turbines in market. All impellers have the same dimensions, and they only differ in channel length and geometry. High. Reimpresión en el año 1995 Incluye bibliografía e índice. where Ui, P, μ, ρ, \(\overline{{u_{i}^{'} u_{j}^{'} }}\), h, T, kf, hi, Dij, Pij, ϕij, εij, Yi, Di,m and Sct represent average velocity, pressure, viscosity, density and Reynolds stress, enthalpy, temperature, thermal conductivity, enthalpy of i species, diffusive term, production, pressure-strain, dissipation rate, mass fraction, diffusion coefficient of i species, and turbulent Schmidt number, respectively. That is, a radially broad flame structure for θ < 45º gives more heat loss via combustor wall than θ ≥ 45º. However, alternative energy resources have become attractive due to the environmental problems created by fossil fuel consumption and limited availability of these fuels. So, to explore the vortical structure strongly coupled to the thermal field, the flow structures and thermal field are analyzed together. All rights reserved. Therefore, in this paper, we focuses on a new wind farm topology, where series or parallel connected fixed speed WTGSs are installed with variable speed wind turbine (VSWT) driven permanent magnet synchronous generators (PMSG). The wires attached with the DC generator through the nacelle. Considering the blade angle of the present fan swirler, the tangential velocity is maximized at θ ≈ 45º. The Finn Wind Tuule C 200 turbine is also considered as a good candidate to be used in a hybrid system to produce more energy than that of generated by itself. This paper presents a new operational strategy for a small scale wind farm which is composed of both fixed and variable speed wind turbine generator systems (WTGS). This model is then calibrated against existing wind flow modelling software to a high degree of accuracy.

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