Corner separation control in compressor cascade based on L-shaped endwall groove

被引：0

作者：

Wang B. ^{[1
]}

Wu Y. ^{[1
,2
]}

Huang L. ^{[1
]}

Wang Z. ^{[1
]}

机构：

[1] School of Power and Energy, Northwestern Polytechnical University, Xi’an

[2] Shaanxi Key Laboratory of Internal Aerodynamics in Aero-Engine, Xi’an

来源：

Hangkong Xuebao/Acta Aeronautica et Astronautica Sinica | 2024年 / 45卷 / 10期

基金：

中国国家自然科学基金;

关键词：

compressor cascade; corner separation; design parameter; groove separation vortex; L-shaped endwall groove;

D O I：

10.7527/S1000-6893.2023.29206

中图分类号：

学科分类号：

摘要：

To overcome the shortcomings of current vortex generator techniques used to control corner separation in compressors，we investigate the mitigation of corner separations using the streamwise vortex generated by the L-shaped endwall groove in a high-speed compressor cascade. First of all，a convenient and universal parametric modeling method for the L-shaped endwall groove has been proposed by introducing the standard modeling space and function superposition strategy，and the L-shaped endwall groove optimization was conducted based on this method. The simulated flow fields of the baseline cascade and a Pareto-optimal case have been compared. It was found that the groove separation vortex generated by the L-shaped groove could effectively block the endwall cross flow，cut off the supply of low momentum endwall fluid to the corner region，and therefore significantly mitigated the reverse flow in the corner region and avoid the formation of the corner separation vortex，remarkably improving the cascade performance within a wide range of incidence. Calculated results of different Pareto-optimal cases have been compared. The results show that the strength of the groove separation vortex determines the control effect of the groove on the endwall cross flow and the severity of additional loss and blockage caused by the groove，and thus is the key factor influencing the control effect of the L-shaped endwall groove. Secondly，the influence of design parameters on the L-shaped endwall groove and its mechanism have been analyzed through the combined use of the Sobol indices-based sensitivity analysis method and conventional control variate method. It was found that the control effect of the endwall groove was significantly influenced by four design parameters including the pitchwise location of the groove，groove depth，the width and length of the upstream groove. The pitchwise location of the groove determined the distance between the groove separation vortex and suction-side corner region，while the other three mainly influenced the strength of the groove separation vortex. Finally，a guideline for selecting design parameters of the L-shaped endwall groove has been summarized based on the above analyses. © 2024 Chinese Society of Astronautics. All rights reserved.

引用

共 30 条

[1]

HORLOCK J H, LOUIS J F, PERCIVAL P M E, Et al., Wall stall in compressor cascades[J], Journal of Basic Engineering, 88, 3, pp. 637-648, (1966)

[2]

DRING R P, JOSLYN H D, HARDIN L W., An investigation of axial compressor rotor aerodynamics[J], Journal of Engineering for Power, 104, 1, pp. 84-96, (1982)

[3]

JOSLYN H D, DRING R P., Axial compressor stator aerodynamics[J], Journal of Engineering for Gas Turbines and Power, 107, 2, pp. 485-492, (1985)

[4]

DODDS J, VAHDATI M., Rotating stall observations in a high speed compressor—Part Ⅱ:Numerical study[J], Journal of Turbomachinery, 137, 5, (2015)

[5]

YAMADA K, FURUKAWA M, TAMURA Y, Et al., Large-scale DES analysis of stall inception process in a multi-stage axial flow compressor:GT2016-57104, (2016)

[6]

DICKENS T, DAY I., The design of highly loaded axial compressors[J], Journal of Turbomachinery, 133, 3, (2011)

[7]

HERGT A, MEYER R, ENGEL K., Effects of vortex generator application on the performance of a compressor cascade, Journal of Turbomachinery, 135, 2, (2013)

[8]

HERGT A, MEYER R, MULLER M, Et al., Loss Reduction in compressor cascades by means of passive flow control:GT2008-50357, (2008)

[9]

ORTMANNS J, PIXBERG C, GUMMER V., Numerical investigation of vortex generators to reduce cross-passage flow phenomena in compressor stator end-walls [J], Proceedings of the Institution of Mechanical Engineers,Part A:Journal of Power and Energy, 225, 7, pp. 877-885, (2011)

[10]

LI J G, CHU W L, ZHANG H G, Et al., Mechanism investigation of effects of plow vortex generator on high-load compressor cascade, Journal of Propulsion Technology, 38, 10, pp. 2331-2339, (2017)

← 1 2 3 →