北京航空航天大学学报 ›› 2014, Vol. 40 ›› Issue (8): 1055-1059.doi: 10.13700/j.bh.1001-5965.2013.0536

• 论文 • 上一篇    下一篇

表面粗糙或带凸起转盘风阻扭矩实验

张达1, 罗翔1, 徐国强1, 田淑青2   

  1. 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;
    2. 中航商用航空发动机有限责任公司 设计研发中心, 上海 201108
  • 收稿日期:2013-09-16 出版日期:2014-08-20 发布日期:2014-08-27
  • 作者简介:张达(1986-),男,辽宁沈阳人,博士生,zhangdamail@gmail.com.
  • 基金资助:

    航空科学基金资助项目(2012ZBN2002)

Windage measurements for rotating disc with protrusions

Zhang Da1, Luo Xiang1, Xu Guoqiang1, Tian Shuqing2   

  1. 1. National Key Laboratory on Aero-Engines, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;
    2. R & D Center, AVIC Commercial Aircraft Engine Co., LTD., Shanghai 201108, China
  • Received:2013-09-16 Online:2014-08-20 Published:2014-08-27

摘要: 为研究壁面不同粗糙程度以及带有螺栓等表面凸起的转盘风阻扭矩特性,建立了一个转盘扭矩测量实验台.自由盘测量结果与经典经验关系式较好的符合度验证了测量方法的准确性.分析研究了在不同粗糙度以及附有6种凸起结构的转盘风阻扭矩规律.结果表明,壁面的粗糙会增大转盘受到的扭矩,在所测量旋转雷诺数范围内,从气动光滑一直到粗糙高度0.2 mm,扭矩系数增大1倍.基于气动光滑自由盘经验关系式进一步总结出相对粗糙度对于风阻扭矩的影响系数.对比6种凸起引起的风阻扭矩特性发现,叶型凸起会大幅降低风阻扭矩.凸起安装迎风角度的改变会带来10%的风阻扭矩差别.结合自由光滑盘扭矩系数经验关系式,总结出不同凸起形状对于扭矩系数的影响因数.

Abstract: A new test rig was performed to investigate the windage torque of the rotating disc with protrusions or roughness on the rotor surface. The new measurement method was verified accurately with the comparison between the free disc data and the correction in open literatures. Six configurations of protrusion were carried out. The results show that the moment coefficient of rotor increases with increasing the disc surface roughness. The increasing roughness from hydrodynamically smooth to a roughness ratio of 1 120(corresponding to a roughness height of 0.2 mm) causes a double torque value of rotor within the test range. The impact factors obtained from hydrodynamically smooth disc case were derived for the roughness disc cases. The blade shape protrusion caused the smallest friction torque of the rotor within the six configurations. Changing the protrusions orientation with respect to the direction of the fluid causes the moment coefficient a difference of approximately 10 percents. New correlations were proposed for the windage torque for the hydrodynamically smooth and the roughness rotor cases and the rotor with protrusions respectively.

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