热能与动力

设计工况下非轴对称端壁造型方法对涡轮动叶性能的影响

  • 张洪鑫 ,
  • 李燕飞 ,
  • 陈绍文 ,
  • 王松涛 ,
  • 王仲奇
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  • (哈尔滨工业大学 发动机气体动力研究中心,哈尔滨 150001)
张洪鑫(1989 — ),男,博士生,E-mail:zhanghongxin0404@163.com.

收稿日期: 2018-06-21

  修回日期: 2018-10-16

  网络出版日期: 2018-10-16

基金资助

国家自然科学基金资助项目(51436002).

Effect of non-axisymmetric endwall modeling method on turbine blade performance under design conditions

  • ZHANG Hong-xin ,
  • LI Yan-fei ,
  • CHEN Shao-wen ,
  • WANG Song-tao ,
  • WANG Zhong-qi
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  • (Engine Aerodynamics Research Centre, Harbin Institute of Technology, Harbin 150001,China)

Received date: 2018-06-21

  Revised date: 2018-10-16

  Online published: 2018-10-16

摘要

为揭示非轴对称端壁控制涡轮动叶二次流的物理机制,采用三角函数造型方法,对设计工况下某一燃气涡轮的第一级动叶进行数值研究.结果表明,只有在合适的非轴对称端壁半径扰动量下,才能获得较好的气动收益;扰动半径在5% ~ 10%叶高内,性能会有所提升.相对于造型幅值,气动性能对造型几何位置更为敏感.本文采用的三角函数造型法主要通过合理降低横向压力梯度,推迟通道涡发展,从而减弱通道涡强度和维度,进而降低流动损失.

本文引用格式

张洪鑫 , 李燕飞 , 陈绍文 , 王松涛 , 王仲奇 . 设计工况下非轴对称端壁造型方法对涡轮动叶性能的影响[J]. 大连海事大学学报, 2019 , 45(1) : 96 -101 . DOI: 10.16411/j.cnki.issn1006-7736.2019.01.012

Abstract

To reveal the physical mechanism of non-axisymmetric end-wall control of secondary flow for turbine blades, a numerical study of the first stage rotor blade of a gas turbine under design conditions was carried out by using trigonometric function modeling method. Results show that good aerodynamic benefits can be obtained only when the appropriate non-axisymmetric end-wall radius perturbation is applied. The performance will be improved for a disturbance radius ranges from 5% to 10% of the blade height. Compared to the non-axisymmetric end-wall shape amplitude, the aerodynamic performance is more sensitive to the non-axisymmetric end-wall geometric location. This method can reduce reasonably the transverse pressure gradient and delay the development of passage vortex, and thus result in the weakening of intensity and dimension of channel vortex, and then the flow loss is reduced.

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