Experimental and Numerical Studies of a Horizontal Axis Wind Turbine Performance over a Steep 2D Hill

Ibrahim, Omar M. A. M.; Yoshida, Shigeo

doi:10.5109/1957496

Cited by 23 publications

(22 citation statements)

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“…A zone of dense mesh elements is created around the diffuser to capture the pressure gradient that occurs across it. Figure 4c shows inflation layers, which were also created around the diffuser walls to capture the boundary layer; a similar way was followed by Halawa et al 24) and Ibrahim et al 25) . The mesh elements everywhere else in the domain are unstructured 3D tetrahedral cells, created using Ansys meshing.…”

Section: Computational Domain Descriptionmentioning

confidence: 82%

Wind Lens Performance Investigation at Low Wind Speed

Takeyeldein¹,

Lazim²,

Ishak³

et al. 2020

Evergreen

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Section: Computational Domain Descriptionmentioning

confidence: 82%

Wind Lens Performance Investigation at Low Wind Speed

Takeyeldein¹,

Lazim²,

Ishak³

et al. 2020

Evergreen

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“…(1) are formulated. In order to solve μ T , the SST k -ω model is used whereby transport equations are incorporated for the turbulent frequency, ω and the turbulence kinetic energy, k 30) . The SST k -ω model is employed because for this specific study, reasonably precise quality of boundary layers is essential 25) because the interaction of reactant flow with the annulus wall has an essential part for mixing efficiency because of the limited area inside the annulus.…”

Section: Numerical Model Setupmentioning

confidence: 99%

Predictive Numerical Analysis on the Mixing Characteristics in a Rotating Detonation Engine (RDE)

Rahman¹,

Wahid²,

Yasin³

et al. 2021

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Detonation potential in rotating detonation engine (RDE) depends on well-mixed fuel and oxidizer in the annulus. A numerical study was carried out to analyze hydrogen (H 2 ) -oxygen (O 2 ) mixing in RDE prior to the detonation. A validation was effectively achieved by comparing the expected detonation criteria with the reported experimental results where less than 10 % error was observed. Non-reacting flow inside the annulus was examined with a new parameter describing the fuel uniformity, the amplitude of the maximum deviation from the H 2 average mass fraction, | |. The numerical results are generated at variable distance between the fuel injector and the oxidizer plenum, D to provide insights on the fuel uniformity and the mixing efficiency. Case A3 with D = 6 mm results in the worst mixing indicated by the highest | | of 0.0156. This happened due to the impingement of fuel stream that separates the stream into two distinctive flows and formed two major vortices that separates the fuel streams. Case A1 with D = 2 mm results in the best mixing indicated by the lowest | | of 0.0012 due to the cross flow collisions of fuel and oxidizer and large turbulent region created. The location of fuel inlet situated face to face with the 90° elbow wall has been predicted to generate the most significant fuel distribution imbalance within the annulus. In conclusion, prediction towards excessive fuel inhomogeneity in the annulus as one of the major factors affecting stability of detonation wave for RDE is achieved in this study.

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“…Experimental works have been recognized as a welltestified instrumentation to conduct the research [22][23][24][25] . Hence, the turbine model of the final design had been fabricated to be tested at the Universiti Teknologi Malaysia's wind tunnel (UTM-LST).…”

Section: Wind Tunnel Testingmentioning

confidence: 99%

Wind Turbine Design Using Thin Airfoil SD2030

Takeyeldein¹,

Lazim²,

Mohd³

et al. 2019

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This paper presents the performance of a horizontal axis wind turbine of diameter 0.6 m designed to operate at low Reynolds number. In this design work, the SD2030 thin airfoil was selected as a profile section for the turbine blades. The taper ratio, section twist angle and blade angle were optimized using the Blade Element Momentum (BEM) theory. In a numerical investigation, the aerodynamic flow field was computed using the two-dimensional Reynolds Averaged Navier-Stokes equations for incompressible flow to predict the performance of the airfoil at the Reynolds number of 1 x 10 5. The numerical results obtained were in accordance with the wind tunnel test's result and thus validating this Computational Fluid Dynamics (CFD) works. Results depict that this new turbine design with the airfoil of SD2030 can rotate at a low start-up wind speed of 2.4 m/s, testifying that the design is successful, and that the turbine is capable to operate at low Reynolds number such as 1 x 10 5 with the desired output.

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Experimental and Numerical Studies of a Horizontal Axis Wind Turbine Performance over a Steep 2D Hill

Cited by 23 publications

References 0 publications

Wind Lens Performance Investigation at Low Wind Speed

Wind Lens Performance Investigation at Low Wind Speed

Predictive Numerical Analysis on the Mixing Characteristics in a Rotating Detonation Engine (RDE)

Wind Turbine Design Using Thin Airfoil SD2030

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