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旋转对冲击射流流动及换热影响的数值研究
引用本文:蔡学成,李芹,杨学森,董威. 旋转对冲击射流流动及换热影响的数值研究[J]. 航空动力学报, 2021, 36(1): 70-77. DOI: 10.13224/j.cnki.jasp.2021.01.009
作者姓名:蔡学成  李芹  杨学森  董威
作者单位:上海交通大学机械与动力工程学院,上海200240
基金项目:国家数值风洞项目(NNW2018-ZT2B04)
摘    要:为了探究旋转对动叶前缘冲击射流流动及换热的影响机制,采用数值模拟的方法对比分析了静止条件和三种不同旋转转速下的流场结构与换热情况.结果表明:冲击靶面的平均努塞尔数随转速的增大而减小,最高转速下,靶面平均努塞尔数下降约16%.另一方面,压力面和吸力面侧对旋转的敏感性不同.高转速下,换热的削弱主要集中在吸力面和压力面无量纲...

关 键 词:旋转效应  冲击射流  动叶前缘  科氏力  流动换热
收稿时间:2020-06-22

Numerical investigation on effect of rotation on flow and heat transfer of impinging jets
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
Authors:CAI Xuecheng  LI Qin  YANG Xuesen  DONG Wei
Affiliation:School of Mechanical Engineering, Shanghai Jiao Tong University,Shanghai 200240,China
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.
Keywords:rotation effect  impinging jets  blade leading edge  Coriolis force  ,flow and heat transfer
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