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CAI Xuecheng, LI Qin, YANG Xuesen, DONG Wei. Numerical investigation on effect of rotation on flow and heat transfer of impinging jets[J]. Journal of Aerospace Power, 2021, 36(1): 70-77. doi: 10.13224/j.cnki.jasp.2021.01.009
Citation: CAI Xuecheng, LI Qin, YANG Xuesen, DONG Wei. Numerical investigation on effect of rotation on flow and heat transfer of impinging jets[J]. Journal of Aerospace Power, 2021, 36(1): 70-77. doi: 10.13224/j.cnki.jasp.2021.01.009
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Numerical investigation on effect of rotation on flow and heat transfer of impinging jets

doi: 10.13224/j.cnki.jasp.2021.01.009

  • School of Mechanical Engineering, Shanghai Jiao Tong University,Shanghai 200240,China

  • Received Date: 2020-06-22
  • Publish Date: 2021-01-28
    Abstract
  • In order to explore the effects of rotation on impinging jets flow and heat transfer characteristics of the blade leading edge, the flow structure and heat transfer distribution were studied by numerical method. Furthermore, the differences between the stationary condition and three rotation speeds were compared and analyzed. Results showed that the target average Nusselt number decreased with the increase of the rotation speed. At the highest rotation speed, the target average Nusselt number was reduced by 16%. On the other hand, the sensitivity of pressure side and suction side to rotation was different. At high rotation speed, the decrement of heat transfer was mainly concentrated on the entire suction side and the area where the dimensionless curve length s/d was less than 2 on the pressure side, while the heat transfer in the area where s/d was greater than 2 on the pressure side was slightly enhanced. Rotation had a significant effect on the flow structure. The mass flow distribution of the jet holes was changed by rotation, and Coriolis forces deflected jets to the pressure side. This feature became more pronounced with the increase of rotating speed. In addition, the centrifugal force in the rotating channel changed the local intensity of crossflow.

     

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