Effect of U-grooves on high-lift low pressure turbine profile's incidence characteristics

ZHANG Bo; LI Wei; DU Qiang; HUANG En-liang; LU Xin-gen; ZHU Jun-qiang

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Effect of U-grooves on high-lift low pressure turbine profile's incidence characteristics

更新时间：2026-07-07

- Effect of U-grooves on high-lift low pressure turbine profile's incidence characteristics
- Vol. 27, Issue 7, (2012)
- 作者机构：
  
  1. 中国科学院研究生院,北京,100190
  2. 中国科学院工程热物理研究所轻型动力重点实验室,北京,100190
- 作者简介：
- 基金信息：
- DOI：
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- Published：2012
- 稿件说明：
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ZHANG Bo, LI Wei, DU Qiang, et al. Effect of U-grooves on high-lift low pressure turbine profile's incidence characteristics[J]. 2012, 27(7).
DOI：

ZHANG Bo, LI Wei, DU Qiang, et al. Effect of U-grooves on high-lift low pressure turbine profile's incidence characteristics[J]. 2012, 27(7). DOI：

摘要

以某高负荷低压涡轮叶型为研究对象

分析了该叶型在低雷诺数下的攻角特性

并应用了表面嵌壁式U形槽的被动控制方法来提高该叶型的攻角裕度.数值模拟的结果表明:相比较大的正攻角流动状况

叶型较大的负攻角并不会引起吸力面大的流动分离

从而减小了叶型损失;表面嵌壁式U型槽通过推迟分离、加速再附来减小分离泡甚至减小湍流湿面积

从而降低叶型损失;表面嵌壁式U型槽能否提高该叶型的攻角裕度与开槽位置和深度有关系

在±15°攻角范围内72%轴向弦长位置处开槽明显的降低了叶型损失而开槽深度为0.40mm时叶型损失最小.

Abstract

The high-lift low pressure turbine blade profile incidence characteristics under low Reynolds number were investigated.The modification used recessed U-grooves to improve the profiles’ incidence margin.The numerical simulations suggest that compared with high incidence flow condition

lower incidence does not induce large separation which appears on the suction surface of the profile and hence lessens profile loss.The recessed U-grooves delay the separation location

accelerate reattach location

decrease the turbulent wetted area

thereby the separation bubble is suppressed and the profile loss decreases.Whether or not the recessed U-grooves can improve the incidence margin is related to the depth and location of the U-grooves.With±15 incidence degrees

the U-grooves located in 72% axial chord length showed lower profile loss

and when the depth was 0.40mm the profile loss was the lowest.

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Related Author

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Chuangxin ZHOU

Shengfeng ZHAO

Xingen LU

Junqiang ZHU

Hongzhi CHENG

GUO Fei-fei

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Related Institution

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Innovation Academy for Light⁃duty Gas Turbine，Chinese Academy of Sciences

Laboratory of Light⁃Duty Gas⁃Turbine，Institute of Engineering Thermophysics，Chinese Academy of Sciences

Aeronautics and Astronautics Engineering College, Air Force Engineering University

National Key Laboratory of Science and Technology on Aero-Engine Aero-Thermodynamics,School of Energy and Power Engineering,Beijing University of Aeronautics and Astronautics

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