北京航空航天大学学报 ›› 2008, Vol. 34 ›› Issue (8): 961-963.

• 论文 • 上一篇    下一篇

V型沟槽表面流动换热的比拟特性

刘昆,陶智,吴宏,王蛟   

  1. 北京航空航天大学 航空发动机气动热力重点实验室, 北京 100191
  • 收稿日期:2007-07-18 出版日期:2008-08-31 发布日期:2010-09-17
  • 作者简介:刘 昆(1984-),男,湖南岳阳人,硕士生,liukun7926@gmail.com.
  • 基金资助:

    航空科学基金的资助项目(04C51036)

Analogy performance of flow and heat transfer on the V groove surface

Liu Kun, Tao Zhi, Wu Hong, Wang Jiao   

  1. National Key Laboratory on Aero-Engines, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
  • Received:2007-07-18 Online:2008-08-31 Published:2010-09-17

摘要: 利用实验的方法,对静止状态下"V"型沟槽表面通道在不同雷诺数下的流动与换热特性进行了比拟研究.研究结果表明:相比平板通道流动,宽与深均为0.5mm(h=s=0.5mm)的沟槽表面在实验范围内(10000<Re<80000)具有明显的减阻效果,同时具有弱化换热特性,证明了比拟理论的正确性,且减阻效果和弱化换热效果随着雷诺数增加而减小.此研究为涡轮叶片外换热提供了一种技术储备.

Abstract: The drag and heat transfer characteristics of small longitudinal V groove surfaces in the rectangular channel were investigated experimentally based on the Reynold analogy. Within the range of Reynolds number from 10 000 to 80 000, the experimental results indicated that the V groove surface of h=s=0.5mm had drag-reduction characteristics,and the heat transfer of the V groove surface also be weakened, which demonstrates the correctness of the theory of Reynold analogy. The weakeness of heat transfer and drag-reduction decreased as Reynolds number increased. The decrease of heat transfer and drag-reduction contributed to the improvement of performance of aircraft engine, which will be beneficial to the flow and heat transfer when this type of surface applys to the surface of turbine vane.

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