CFD studies of the effect of holes and angles of upstream duct of horizontal axis wind turbines
Source abstract
Abstract
This work presents an approach to the analysis of duct-augmented wind turbines using Computational Fluid Dynamics (CFD). The main objective is to find the optimum duct shape and design that gives maximum boost to the performance of wind turbines. A duct surrounding the rotor is able to increase the power coefficient above the Betz limit, so it has attracted great attention for many years. In this work, an extensive analysis of the performance of duct augmented wind turbines is presented, considering the influence of various duct angles and axial holes in the diffuser on the efficiency, in which a new formulation for the far-wake velocity is proposed. This study consists of two main parts. The first part compares the experimental performance of a conventional wind turbine with the identical turbine modeled and solved using CFD. Once the CFD results are validated, the second part presents an extensive parametric study by integrating a convergent duct with different parametric designs into the wind turbine model. The study reveals that the CFD results are in close agreement with the experimental results. It is found that the presence of holes in the duct has a detrimental effect on performance. However, the increase in the angle of the duct enhanced the performance, and there was an average increase in power output by 96% with a duct angle of 20°.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Wind Energy Research and Development · Wind and Air Flow Studies · Aerodynamics and Fluid Dynamics Research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Sustainable Energy Technologies Center, King Saud University 1 , P.O. Box 800, Riyadh 11421, Saudi Arabia
K.A.CARE Energy Research and Innovation Center at Riyadh 2 , King Saud University, Riyadh, Saudi Arabia
Mechanical Engineering Department, King Saud University 3 , P.O. Box 800, Riyadh 11421, Saudi Arabia
Master of Science Program in Renewable Energy, Deanship of Graduate Studies, King Saud University, Riyadh, Saudi Arabia 4
5Saudi Arabian Oil Company, P.O. Box 5000, Dhahran 31311, Saudi Arabia
Funding
Deputyship for Research and Innovation, Ministry of Education, Saudi Arabia
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