Numerical Study on Leakage Flow Characteristics of Turbine Blade Squealer Tip at Low Reynolds Numbers

PENG Hao; SHEN Bin; DAI Ren; CHEN Liu

doi:10.19805/j.cnki.jcspe.2025.240480

English Version Journal Login

您当前的位置：

首页 >

文章列表页 >

Numerical Study on Leakage Flow Characteristics of Turbine Blade Squealer Tip at Low Reynolds Numbers

更新时间：2026-10-10

- Numerical Study on Leakage Flow Characteristics of Turbine Blade Squealer Tip at Low Reynolds Numbers
- Chinese Journal of Power Engineering Vol. 45, Issue 9, Pages: 1379-1386(2025)
- 作者机构：
  
  上海理工大学能源与动力工程学院,上海,200093
- 作者简介：
- 基金信息：
- DOI：10.19805/j.cnki.jcspe.2025.240480
  CLC：
- Online First：16 September 2025，
  
  Published：2025
- 稿件说明：
移动端阅览
彭昊,沈斌,戴韧,陈榴. 低雷诺数下涡轮叶顶凹槽泄漏流动特性的数值研究动力工程学报, 2025, 45(9): 1379-1386 https://doi.

org/10.19805/j.cnki.jcspe.2025.240480
彭昊,沈斌,戴韧,陈榴. 低雷诺数下涡轮叶顶凹槽泄漏流动特性的数值研究动力工程学报, 2025, 45(9): 1379-1386 https://doi. DOI： 10.19805/j.cnki.jcspe.2025.240480.

org/10.19805/j.cnki.jcspe.2025.240480 DOI：

摘要

减少叶顶泄漏损失对于提高低雷诺数涡轮气动性能至关重要。通过数值模拟方法

对比了平顶叶尖结构

分析了雷诺数

在3.5×10

~35×10

范围内凹槽叶尖间隙内的流动特性。结果表明:当叶栅与机匣存在相对运动时

叶顶泄漏损失在总损失中的占比与雷诺数有关

泄漏损失随着雷诺数的增大而增大;在常规低雷诺数范围内

还存在一个第二临界雷诺数

=6×10

当

时

叶顶凹槽不仅无法减少泄漏质量流量

反而会加剧泄漏流与主流的掺混

增大叶顶流场处的流动损失;当

时

凹槽结构能够有效抑制泄漏质量流量

提升涡轮级效率

在本文计算工况中

效率最大提升幅度可达0.28百分点。

Abstract

Reducing tip leakage losses is crucial for improving the aerodynamic performance of low Reynolds number turbines. By using numerical simulation methods

flat blade tip structure was compared with squealer blade tip

and their flow characteristics within tip clearance were analyzed for Reynolds number (

) range of 3.5×10

-35×10

. Results show that when there is a relative motion between blade row and casing

the proportion of blade tip leakage losses to total losses is related to the Reynolds number

with leakage losses increasing as the Reynolds number increases. Within the conventional low Reynolds number range

there exists a second cri

tical Reynolds number

=6×10

. When

the squealer tip not only fails to reduce leakage flow rate but actually intensifies the mixing of the leakage flow with the main flow

increasing the flow losses at the blade tip. When

the squealer structure can effectively suppress leakage flow rate and improve the turbine stage efficiency. In the calculation conditions of this paper

the maximum efficiency improvement can reach 0.28%.

关键词

Keywords

references

LAKE J, KING P, RIVIR R. Reduction of separation losses on a turbine blade with low Reynolds numbers[C]//37th Aerospace Sciences Meeting and Exhibit. Reno, NV, USA: AIAA, 1999.

SHARMA O. Impact of Reynolds number on LP turbine performance[R]. [S.l.:s.n.], 1998.

张天龙, 陈强, 赵展, 等. 雷诺数对高负荷低速涡轮性能影响的试验研究[J]. 测控技术, 2024, 43(2): 74-79. ZHANG Tianlong, CHEN Qiang, ZHAO Zhan, et al. Experimental study on the effect of Reynolds number on the performance of high-load low-speed turbines[J]. Measurement & Control Technology, 2024, 43(2): 74-79.

WISLER D C. The technical and economic relevance of understanding blade row interaction effects in turbomachinery[J]. Lecture Series-van Kareman Institute for Fluid Dynamics, 1998, 2: H1-H17.

SJOLANDER S A, AMRUD K K. Effects of tip clearance on blade loading in a planar cascade of turbine blades[J]. Journal of Turbomachinery, 1987, 109(2): 237-244.

李伟, 乔渭阳, 许开富, 等. 雷诺数对涡轮叶尖流场影响的数值研究[J]. 推进技术, 2007, 28(4): 388-393. LI Wei, QIAO Weiyang, XU Kaifu, et al. Numerical simulation for effects of Reynolds numbers on tip leakage flows in turbine[J]. Journal of Propulsion Technology, 2007, 28(4): 388-393.

MATSUNUMA T. Effects of Reynolds number and freestream turbulence on turbine tip clearance flow[J]. Journal of Turbomachinery, 2006, 128(1): 166-177.

孙皓, 薛志恒, 李军, 等. 低雷诺数对透平叶片间隙泄漏流动影响的研究[J]. 西安交通大学学报, 2010, 44(3): 11-15, 31. SUN Hao, XUE Zhiheng, LI Jun, et al. Effects of low Reynolds number on turbine blade tip leakage flow[J]. Journal of Xi'an Jiaotong University, 2010, 44(3): 11-15, 31.

YARAS M I, SJOLANDER S A. Effects of simulated rotation on tip leakage in a planar cascade of turbine blades: part I—tip gap flow[J]. Journal of Turbomachinery, 1992, 114(3): 652-659.

SHAO Z Y, LI W, ZHU Y L, et al. Tip leakage flow analysis of an axial turbine under the effect of separation at low Reynolds number[J]. Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, 2020, 234(6): 751-765.

练智博, 杜雪霏, 许斌, 等. 斜切式叶顶形状下非均等流量射流对叶顶间隙泄漏流动的影响[J]. 动力工程学报, 2023, 43(8): 992-999. LIAN Zhibo, DU Xuefei, XU Bin, et al. Influence of Non-uniform flow jet on tip clearance leakage flow under oblique blade tip shape[J]. Journal of Chinese Society of Power Engineering, 2023, 43(8): 992-999.

ZHOU Kai, ZHOU Chao. Aerodynamic effects of an incoming vortex on turbines with different tip geometries[J]. Journal of Turbomachinery, 2021, 143(8): 081009.

ZOU Zhengping, SHAO Fei, LI Yiran, et al. Dominant flow structure in the squealer tip gap and its impact on turbine aerodynamic performance[J]. Energy, 2017, 138: 167-184.

MATSUNUMA T. Unsteady flow field of an axial-flow turbine rotor at a low Reynolds number[J]. Journal of Turbomachinery, 2007, 129(2): 360-371.

AINLEY D G, MATHIESON G C R. A method for performance estimation for axial-flow turbines[R]. [S.l.]:Aeronautical Research Council Reports & Memoranda, 1957.

岳隆, 王云飞, 宋彦萍, 等. 雷诺数对低压涡轮气动性能的影响分析[J]. 中国电机工程学报, 2022, 42(3): 1043-1051. YUE Long, WANG Yunfei, SONG Yanping, et al. Influence of Reynolds number on the aerodynamic characteristics of low-pressure turbine[J]. Proceedings of the CSEE, 2022, 42(3): 1043-1051.

段文华, 陈伟杰, 赵鑫雨, 等. 高马赫数低雷诺数的涡轮叶栅试验[J]. 航空动力学报, 2024, 39(10): 20220827. DUN Wenhua, CHEN Weijie, ZHAO Xinyu, et al. Experiment of turbine cascade under high Mach number and low Reynolds number conditions[J]. Journal of Aerospace Power, 2024, 39(10): 20220827.

YOUNG J B, WILCOCK R C. Modeling the air-cooled gas turbine: part 2—coolant flows and losses[J]. Journal of Turbomachinery, 2002, 124(2): 214-221.

ZHOU Ling, HANG Jianwei, BAI Ling, et al. Application of entropy production theory for energy losses and other investigation in pumps and turbines: a review[J]. Applied Energy, 2022, 318: 119211.

HU Zhenxuan, LI Jinhua, LIU Xingchi, et al. A robotic system with a bendable catheter for laparoendoscopic single site surgery[J]. Journal of Medical Devices, 2024, 18(3): 031001.

李少军, 李军, 龚存忠, 等. 考虑叶顶泄漏的透平级非定常气动性能研究[J]. 动力工程学报, 2011, 31(11): 823-829. LI Shaojun, LI Jun, GONG Cunzhong, et al. Study on unsteady aerodynamic performance of turbine stage considering tip leakage flow[J]. Journal of Chinese Society of Power Engineering, 2011, 31(11): 823-829.

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Data Assimilation Method for Turbine Cascade FlowField with Low Reynolds Number

Dual-channel Short-term Wind Power Forecasting Fusing Long- and Short-term Dependencies

Double-layer Coordination Economic and Real-time Dispatching Strategy for Large-scale Energy Base

Research on Trading Decision of Wind-Photovoltaic-Gas Combined System Participating in Day-ahead and Real-time Markets Considering Wind and Photovoltaic Uncertainty

Optimized Scheduling of Virtual Power Plant Considering Coal-biomass Co-firing Carbon Capture and Low Carbon Incentive Mechanism

Related Author

TANG Xinzi

HUANG Xuanqing

SUN Songfeng

PENG Ruitao

Related Institution

School of Mechanical Engineering, Xiangtan University

AI问答

⁰