Numerical Study on Active Flow Separation Control for Low-Pressure Turbine Blade

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Numerical Study on Active Flow Separation Control for Low-Pressure Turbine Blade

更新时间：2025-07-09

- Numerical Study on Active Flow Separation Control for Low-Pressure Turbine Blade
- Vol. 44, Issue 9, Pages: 21-26(2010)
- 作者机构：
  
  西安交通大学能源与动力工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：
  CLC： V231.3
- Online First：10 September 2010，
  
  Published：2010
- 稿件说明：
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Numerical Study on Active Flow Separation Control for Low-Pressure Turbine Blade[J]. 2010, 44(9): 21-26.
DOI：

Numerical Study on Active Flow Separation Control for Low-Pressure Turbine Blade[J]. 2010, 44(9): 21-26. DOI：

摘要

基于Langtry-Menter转捩模型的Menter SST两方程模型

通过数值求解了三维非定常雷诺时均Navier-Stokes方程

研究了雷诺数(Re)和来流湍流强度(I

FSTI

)对Pak-B低压透平叶片吸力面流动分离的影响.计算结果表明:该湍流模型能够较好地预测低压透平叶栅内流动特性

并能有效捕捉到叶片吸力面上流动分离和再附位置; 随着Re和I

FSTI

的增大

叶片吸力面流动分离均有大幅度的减少.在Re和I

FSTI

较低的条件下

数值分析了涡流发生器(VGJ)对低压透平叶片表面流动分离的控制效果

结果表明:VGJ的引入能够有效抑制甚至消除低Re条件下叶片吸力面上的流动分离

减小总压损失和尾迹宽度.在VGJ流动控制中

存在着最佳吹气比

由此可获得最佳的流动控制效果.吹气比太小

不能有效抑制流动分离; 吹气比太大

射流与主流掺混加剧

流动损失增加.当VGJ吹气比为2时

流动控制效果最佳

相对于无VGJ控制时的总压损失减少了45%.

Abstract

The three-dimensional viscous unsteady Reynolds-averaged Navier-Stokes equations were employed to investigate the effects of Reynolds numbers(Re)and freestream turbulence intensity(I

FSTI

)on the flow separation at the suction side of the Pak-B low-pressure turbine(LPT)blade on the basis of the Menter SST turbulence model coupled with the Langtry-Menter transition model. The numerical results indicate that the turbulence simulation can predict the flow characteristics inside the LPT cascade and capture the flow separation and reattachment location at the suction side of the blade effectively. The flow separation at the suction side of the blade decreases significantly with the increase in Re or I

FSTI

. The control

effect of vortex generator jets(VGJs)on the flow separation at the suction side of the blade was numerically analyzed at the low Re and low I

FSTI

. Applying VGJs can suppress the flow separation at the suction side of the blade and reduce the total pressure loss and wake width. There is an optimum blowing ratio(B)in the flow control by VGJs. The flow separation could not be suppressed effectively with a small B and the mixing loss of jet flow and main flow could rise with a large B. The total pressure loss decreases by 45% compared with that without the control by VGJs when B of VGJs equals 2.

关键词

Keywords

references

BONS J P, SONDERGAARD R, RIVIR R B. Control of low-pressure turbine separation using vortex generator jets, AIAA 99-0367[R]. Reston, VA,USA: AIAA, 1999.

BONS J P, SONDERGAARD R, RIVIR R B. Turbine separation control using pulsed vortex generator jets[J]. ASME Journal of Turbomachinery, 2001,123(2):198-206.

LIU X M, NISHI M. Improvement of diffuser performance by using vortex generator jets with different scheme of velocity ratio[C]∥Proceedings of 2003 Meeting of Japan Society of Fluid Mechanics. Tokyo, Japan: Japan Society of Fluid Mechanics, 2003:408-409.

尹进宝, 乔渭阳. 低雷诺数下涡轮叶栅流动分离实验与数值研究 [J]. 推进技术, 2008,29(2):208-213.

YI Jinbo, QIAO Weiyang. Experimental and numerical investigation on flow separation in turbine cascade with low Reynolds number [J]. Journal of Propulsion Technology, 2008,29(2):208-213.

POSTL D, GROSS A, FASEL H F. Numerical investigation of low-pressure turbine blade separation control, A1AA 2003-0614[R]. Reston, VA,USA: AIAA, 2003.

RIZZETTA D P, VISBAL M R. Numerical simulation of separation control for a transitional highly-loaded low-pressure turbine [J]. AIAA Journal, 2005,43(9):1958-1967.

MENTER F R, LANGTRY R B. A correlation-based transition model using local variables, partⅠ: model formulation, ASME-GT 2004-53452 [R]. New York, NY, USA: ASME, 2004.

LANGTRY R B, MENTER F R. A correlation-based transition model using local variables, partⅡ: test cases and industry applications, ASME-GT 2004-53454[R]. New York, NY, USA: ASME, 2004.

HUANG J, CORKE T C, THOMAS F O. Plasma actuators for separation control of low-pressure turbine blades, AIAA 2003-1027[R]. Reston, VA,USA: AIAA, 2003.

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