轴流压气机失速初始扰动的研究进展

在失速主动控制思想的推动下,对轴流压气机失速初始扰动的研究一直是叶轮机械非定常流领域的热点问题之一,同时也是一个尚未认识清楚的难点问题. 本文从失速初始扰动的理论模型、实验研究和机理分析3个方面对轴流压气机失速初始扰动的研究进展进行了回顾.对目前失速初始扰动研究中的集中问题,如低速和高速环境下初始扰动的试验检测方法, 初始扰动类型,以及初始扰动出现的内在流体动力学机理等问题进行了总结. 在此基础上,讨论了叶尖区域的复杂流动特性和失速初始扰动的内在联系,并指出了失速初始扰动研究的发展趋势, 认为今后应进一步深化如下问题:初始扰动形式影响因素的系统研究, 高速压气机中初始扰动新形式研究,初始扰动产生的流体动力学物理机制及其与压气机的设计和运行参数之间的关联性研究. 

A REVIEW OF STUDIES ON STALL PRECURSORS IN AXIAL-FLOW COMPRESSOR

Investigations ofstall precursors in axial flow compressors are always highlightsof the studies of unsteady turbo-machines flow from a viewpoint ofactive control. Despite extensive researches, many aspects ofstall precursors still remain unresolved. This paper reviewstheoretical models, experimental investigations and mechanismexplorations on the stall precursors in the axial-flowcompressors. Major issues of the stall precursors in the axialflow compressors are concentrated on detecting methods in low andhigh speed environments, the types of the stall precursors, thefluid dynamic mechanism of the stall precursors, etc. An inherentrelation between complex end-wall flow behaviors and the stallprecursors was discussed. Meanwhile, recommendations were made forfuture research, i.e, systematical investigation on influentialfactors of the stall precursors, new types of the stall precursorsin high-speed compressors, underlying fluid dynamic mechanisms ofthe stall precursors and the relationship with design andoperating parameters of the axial flow compressors.