Effects of Speed of Controllable Speed Casing on Flow Stability for Transonic Compressor Rotor

被引：0

作者：

Zhong J.-J. ^{[1
]}

Zhao J.-Y. ^{[1
]}

Wu W.-Y. ^{[1
]}

机构：

[1] Merchant Marine College, Shanghai Maritime University, Shanghai

来源：

Tuijin Jishu/Journal of Propulsion Technology | 2022年 / 43卷 / 09期

关键词：

Controllable speed casing; Numerical research; Stable operating margin; Tip leakage vortex; Transonic compressor rotor;

D O I：

10.13675/j.cnki.tjjs.210218

中图分类号：

学科分类号：

摘要：

Controllable speed casing is a kind of casing treatment method by controlling the rotation of the rotatable ring in casing structure to exert an effect on the tip clearance flow field. It can improve the problem of efficiency reduction and poor adaptability under off-design conditions in casing treatment to a certain extent. A numerical study was carried out on the flow stability of a rotatable ring which started from tip leading edge and had a width of the whole axial chord length of the blade tip at the design speed of a transonic compressor rotor. The results show that the increase of rotatable ring speed can continuously raise the stable operating margin of the rotor. The effect of stability expansion is poor first and then significant. When rotatable ring rotates at the design rotor speed，the stable operating margin is improved by 52.56% under the condition that the maximum efficiency is almost constant. It is found that，at low speed，the stability expansion is mainly achieved by reducing the tip blockage area while，at high speed，the instability is delayed by controlling the breakdown of tip leakage vortex. The stable operating margin is improved to different degrees at various speeds. © 2022 Journal of Propulsion Technology. All rights reserved.

引用

共 25 条

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