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ABSTRACT
The flow field in the original duct was simulated using Reynolds-average Navier–Stokes methods. Grid independence test was carried out and the air velocity at four outlets was consistent with experimental data, so the accuracy of the numerical model can be guaranteed. Vortex at the inner wall of the curved duct was identified from the simulation result, and two 75° guide plates with the thickness of 1 mm were used to reduce it. The vortex was well improved and the flow path of air became more regular than the original scheme. Guide plates with gradual increasing height along the airflow direction at the straight duct were proposed to improve the uniformity. The height of the last guide plate was set to 50 mm, the same as original scheme; then, the smallest standard deviation of velocity at four outlets is achieved with the increasing ratio of 1.4.
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No potential conflict of interest was reported by the authors.
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Notes on contributors
Jiawei Lu
Jiawei Lu is a Master in School of Mechanical Engineering at Nanjing University of Science and Technology. His research interest is CFD analysis.
Tao Wang
Tao Wang is a PhD in School of Mechanical Engineering at Nanjing University of Science and Technology. His research interest is vehicle structure design.
Liangmo Wang
Liangmo Wang is a professor in School of Mechanical Engineering at Nanjing University of Science and Technology. His research interest is vehicle dynamics.
Yandong Chen
Yandong Chen is an engineer at Suzhou Jiangnan Aerospace Mechanical and Electrical Industry Co., Ltd.
Wei Chen
Wei Chen is an engineer at Suzhou Jiangnan Aerospace Mechanical and Electrical Industry Co., Ltd.