Numerical Simulations of a VAWT in the Wake of a Moving Car

Tian, Wenlong; Mao, Zhaoyong; Li, Yukai

doi:10.3390/en10040478

Cited by 18 publications

(19 citation statements)

References 17 publications

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“…Banki and Savonius being drag-type VAWTs gave better results, however, Savonius has a lower performance due to the close-center design causing a greater amount of block effect on the flow. Despite a number of studies showing the capability of VAWT to harness wind energy from vehicle wakes [4,7,8], the general acceptability of such system remains low, as there is still no large installation to date. This calls for ideas to improve the performance of the system so it can be more attractive.…”

Section: Geometries and Boundary Conditionsmentioning

confidence: 99%

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Numerical Investigation on the Effects of Varying the Arc length of a Windshield on the Performance of a Highway Installed Banki Wind Turbine

Matias

Danao

Abuan

2021

Fluids

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Two-dimensional computational fluid dynamics (CFD) simulations are employed to investigate the effects of adding a circular-arc-shaped windshield on the performance of a Banki type vertical axis wind turbine (VAWT), particularly to the application where the VAWT is harnessing wind energy in highway caused by the passing vehicles. Unsteady Reynolds-Averaged Navier-Stokes (URANS) is the computational approach used to calculate the turbulent flow within the domain. Two sets of simulation cases based on two different vehicles (i.e., car and a bus) are performed with varying arc-length of the windshield. The results show that the windshield provides an increase in the energy captured by the VAWT by up to 16.14% compared to no windshield case when the car model is used. In contrast, windshield in all the simulation cases using a bus model gives a negative effect to VAWT performance where the worst case yields −64.77%.

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Section: Geometries and Boundary Conditionsmentioning

confidence: 99%

“…Despite a number of studies showing the capability of VAWT to harness wind energy from vehicle wakes [4,7,8], the general acceptability of such system remains low, as there is still no large installation to date. This calls for ideas to improve the performance of the system so it can be more attractive.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation on the Effects of Varying the Arc length of a Windshield on the Performance of a Highway Installed Banki Wind Turbine

Matias

Danao

Abuan

2021

Fluids

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“…As it is known, the SST k À v turbulence model can make highly accurate predictions of rotating machinery because it includes the effect of swirl on turbulence. 33,34 For each of the cases listed in Table 1, there were several simulations, including the tip-speed ratio varying from 0.3 to 0.8. The ratio of runner tip-speed to free flow rate is used to represent the tip-speed ratio, and the expression is…”

Section: Turbulence Model and Solution Setsmentioning

confidence: 99%

Numerical investigation of a small water turbine used for the power supply of underwater vehicles

Mao

Bai

2018

Advances in Mechanical Engineering

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The development of underwater vehicles is facing the problem of sustainable energy supply. This study introduces a small water turbine, the Lenz turbine, for energy generation from the ocean currents which will provide energy for the underwater vehicles. Computational fluid dynamics simulations of the effect of geometric parameters, including the blade radius, chord length, and pitch angle, on the performance of the turbine are conducted. The Reynolds-Averaged Navier-Stokes equations are numerically solved with a sliding mesh method. Thirteen sets of tests in total are performed at different values of tip-speed ratios. The tests are divided into three groups to study the effect of the three parameters mentioned above, separately. The obtained power coefficients, coefficient of torque, and the dynamic torque on a blade are then compared in each group of tests. Pressure contours and velocity contours are given to explain the reason how the geometric parameters affect the rotor performance.

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“…D Kumar and S Sarkar 19 and El-Askary WA et al 20 used obstacle plates or deflectors to optimize the design of Savonius blade turbine. W Tian et al 10,21 optimized the shape of the blade through particle swarm optimization and applied it to highway power generation systems.…”

Section: Introductionmentioning

confidence: 99%

Optimal design of power generation equipment for autonomous underwater vehicle

Guo

Song

Mao

et al. 2018

Advances in Mechanical Engineering

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Autonomous underwater vehicle with the ability to generate electricity is an effective solution for detecting the ocean. In this article, a vertical-axis current generator for underwater vehicle is designed. The blades used for power generation are attached to the surface of the underwater vehicle and can be freely deployed and closed so as not to affect the fluid performance of the underwater vehicle. Comparing the experimental data of an ordinary impeller with simulation data, the initial error of the experiment is obtained. Through the experimental method with adjusting the spread angle and blade curvature, the best configuration of the impeller was eventually obtained. When the radian and expansion angle are both set to 120°, the maximum power of 0.599 W can be provided.

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Numerical Simulations of a VAWT in the Wake of a Moving Car

Cited by 18 publications

References 17 publications

Numerical Investigation on the Effects of Varying the Arc length of a Windshield on the Performance of a Highway Installed Banki Wind Turbine

Numerical Investigation on the Effects of Varying the Arc length of a Windshield on the Performance of a Highway Installed Banki Wind Turbine

Numerical investigation of a small water turbine used for the power supply of underwater vehicles

Optimal design of power generation equipment for autonomous underwater vehicle

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