Numerical Investigations on Nonaxisymmetrical End Wall Profiling and Aerodynamic Performance of a Low Aspect Ratio Cascade

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Numerical Investigations on Nonaxisymmetrical End Wall Profiling and Aerodynamic Performance of a Low Aspect Ratio Cascade

更新时间：2025-07-09

- Numerical Investigations on Nonaxisymmetrical End Wall Profiling and Aerodynamic Performance of a Low Aspect Ratio Cascade
- Vol. 46, Issue 11, Pages: 6-11(2012)
- 作者机构：
  
  西安交通大学叶轮机械研究所,西安,710049
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK263
- Online First：10 November 2012，
  
  Published：2012
- 稿件说明：
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Numerical Investigations on Nonaxisymmetrical End Wall Profiling and Aerodynamic Performance of a Low Aspect Ratio Cascade[J]. 2012, 46(11): 6-11.
DOI：

Numerical Investigations on Nonaxisymmetrical End Wall Profiling and Aerodynamic Performance of a Low Aspect Ratio Cascade[J]. 2012, 46(11): 6-11. DOI：

摘要

提出了基于双控制型线的非轴对称端壁造型新方法

并在某小展弦比叶栅的上下端壁上完成了非轴对称端壁造型设计.采用数值求解Reynolds-Averaged Navier-Stokes(RANS)和考虑转捩模型的SST湍流模型对轴对称端壁原始叶栅和非轴对称端壁叶栅进行了详细的流场特性分析

结果表明:所提方法可以有效减少进入叶栅通道涡的低能流体

从而抑制了通道涡的发展

减少了二次流损失.由于叶栅展弦比较小

所以非轴对称端壁会影响到整个流场

使得出口气流角在整个叶高范围内有所增大

中叶展处叶片负荷下降

型面损失减少.与轴对称端壁原始叶栅相比

非轴对称端壁叶栅效率提高了0.22%

从而验证了所提方法的有效性.

Abstract

A new nonaxisymmetrical end wall profiling method based on two control curves was presented and thenonaxisymmetric end wall profiling of a low aspect ratio cascade was designed by the method. The detailed flow fields of the initial axisymmetrical end wall and the nonaxisymmetrical end wall profiling cascade were numerically investigated using the Reynolds-Averaged Navier-Stokes(RANS)and the SST turbulent model with transition effects. The results show that the nonaxisymmetric end wall reduces the low-energy fluids entering the passage vortex and thus inhibits the development of the passage vortex

resulting in the decrease in the secondary loss. The nonaxisymmetric end wall influences the whole flow field due to the low aspect ratio. The outlet flow angle increases along the whole blade span. In the midspan

the decrease in the blade loading results in the reduction of the profile loss. In addition

the efficiency of end wall profiling cascade increases by 0.22%

compared with that of the initial cascade. The present nonaxisymmetrical end wall profiling method is practicable and feasible.

关键词

Keywords

references

ROSE M G. Non-axisymmetric endwall profiling in the HP NGVs of an axial flow gas turbine [C]∥Proceedings of ASME Turbo Expo 1994 Power for Land, Sea & Air. New York, USA: ASME, 1994: 249.

HARVEY N, ROSE M, SEAMAN P, et al. Nonaxisymmetric turbine end wall design:Part I Three-dimensional linear design system [J]. Transactions of the ASME: Journal of Turbomachinery, 2000, 122(2): 278-285.

HARTLAND J C, SMITH D G, HARVEY N, et al. Nonaxisymmetric turbine end wall design:Part II Experimental validation [J].Transactions of the ASME: Journal of Turbomachinery, 2000, 122(2): 286-293.

GERMAIN T, NAGEL M G. Improving efficiency of a high work turbine using nonaxisymmetric endwalls-PartⅠ Endwall design and performance [J]. Transactions of the ASME: Journal of Turbomachinery, 2010, 132(2): 8-18.

SONODA T, HASENJAGER M, ARIMA T, et al. Effect of end wall contouring on performance of ultra-low aspect ratio transonic turbine inlet guide vanes [J]. Transactions of the ASME: Journal of Turbomachinery, 2009, 131(1): 011020.

李国君, 马晓永, 李军. 非轴对称端壁造型及其对叶栅损失影响的数值研究[J]. 西安交通大学学报, 2005, 39(11): 1169-1172.

LI Guojun, MA Xiaoyong, LI Jun. Non-axisymmetric turbine end wall profiling and numerical investigation of its effect on the turbine cascade loss [J]. Journal of Xi'an Jiaotong University, 2005, 39(11): 1169-1172.

汪传美, 李国君, 郑金, 等. 非轴对称端壁造型技术的实验研究 [J]. 西安交通大学学报, 2008, 42(9): 1086-1190.

WANG Chuanmei, LI Guojun, ZHENG Jin, et al. Experimental investigation of non-axisymmetric endwall profiling technique in cascade [J]. Journal of Xi'an Jiaotong University, 2008, 42(9): 1086-1190.

高增珣, 高学林, 袁新. 透平叶栅非轴对称端壁的气动最优化设计 [J].工程热物理学报, 2007, 28(4): 589-591.

GAO Zengxun, Gao Xuelin, YUAN Xin. Aerodynamic optimal design of non-axisymmetric endwall for a turbine cascade [J]. Journal of Engineering Thermophysics, 2007, 28(4): 589-591.

刘波, 管继伟, 陈云永, 等. 用端壁造型减少涡轮叶栅二次流损失的数值研究 [J].推进技术, 2008, 29(3): 355-359.

LIU Bo, GUAN Jiwei, CHEN Yunyong, et al. Numerical investigation for effect of non-axisymmetric endwall profiling on secondary flow in turbine cascade[J]. Journal of Propulsion Technology, 2008, 29(3): 355-359.

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