The Unstable Behavior of Low and High Speed Compressors
The Unstable Behavior of Low and High Speed Compressors
复制标题
DOI：
10.1115/93-gt-026
复制
发表时间：
1993-05
期刊：
影响因子：
--
通讯作者：
I. Day;C. Freeman
中科院分区：
文献类型：
--
作者：
I. Day;C. Freeman
到目前为止，我们对轴流压气机中失速和喘振的理解，大部分来自于对低速实验室机器的研究。作为一般规则，这些机器不模拟高速压缩机中存在的压缩性效应，因此一直怀疑低速结果是否适用于高速机器。近年来，对主动控制的兴趣引发了对发动机型压缩机中压缩机稳定性的大量研究。在这些实验中使用的仪器已经足够详细，第一次，足够的数据，使高速和低速压缩机之间的直接比较。本文介绍了一个八级固定几何发动机压气机的新数据，并与低速实验室数据进行了比较。结果表明，这两台机器的失速和喘振行为，特别是当发动机压气机在中间速度运行显着的相似性。发动机的结果还表明，正如在实验室试验中一样，喘振是由旋转失速的开始引起的。即使在非常高的速度下也是如此，以前认为喘振可能是通过压缩机移动的冲击波的结果。因此，本文包含了有关高速压缩机的新信息，并证实低速测试是深入了解高速机器性能的有效手段。版权所有© 1993，ASME
By far the greater part of our understanding about stall and surge in axial compressors comes from work on low-speed laboratory machines. As a general rule, these machines do not model the compressibility effects present in high-speed compressors and therefore doubt has always existed about the application of low-speed results to high-speed machines. In recent years interest in active control has led to a number of studies of compressor stability in engine type compressors. The instrumentation used in these experiments has been sufficiently detailed that, for the first time, adequate data is available to make direct comparisons between high-speed and low-speed compressors. This paper presents new data from an eight-stage fixed geometry engine compressor and compares this with low-speed laboratory data. The results show remarkable similarities in both the stalling and surging behaviour of the two machines, particularly when the engine compressor is run at intermediate speeds. The engine results also show that, as in the laboratory tests, surge is precipitated by the onset of rotating stall. This is true even at very high speeds where it had previously been thought that surge might be the result of a blast wave moving through the compressor. This paper therefore contains new information about high-speed compressors and confirms that low speed testing is an effective means of obtaining insight into the behaviour of high-speed machines.Copyright © 1993 by ASME