EXPERIMENTAL INVESTIGATION OF STALL AND SURGE IN A MULTISTAGE COMPRESSOR
EXPERIMENTAL INVESTIGATION OF STALL AND SURGE IN A MULTISTAGE COMPRESSOR
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DOI：
10.1115/1.4034239
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发表时间：
2016-06
影响因子：
1.5
通讯作者：
Enrico Munari;Mirko Morini;M. Pinelli;P. R. Spina;A. Suman
中科院分区：
文献类型：
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作者：
Enrico Munari;Mirko Morini;M. Pinelli;P. R. Spina;A. Suman
流动不稳定性条件，特别是在喘振和失速现象中，一直影响涡轮压缩机的操作可靠性，并且引起了大量的文献的显著兴趣。由于其与离心式和轴流式压气机的工作流量范围、性能和效率密切相关，至今仍是压气机研究的热点之一。许多研究人员通过开发数值模型来解决这个重要问题，而其他人则通过专门进行的实验研究来解决这个问题，以便更好地理解这一现象。本文对某型航空涡轮轴燃气涡轮机轴流离心压气机的稳态和非稳态工况进行了实验研究，获得了压气机在25,000 rpm转速下的性能曲线和喘振时的瞬态特性。通过使用两种不同的试验台布局，发生在压缩机中的不稳定性，超过了特性曲线的峰值，进行了识别和调查。这两种类型的分析是由于压力，温度和质量流量传感器位于战略位置沿着电路。这些测量传感器是适当的控制和采集系统的一部分，其特征在于可调节的采样频率。因此，压缩机所需的运行条件，即质量流量和转速以及这两个参数的瞬态，都由这个专用控制系统进行调节。© 2016 ASME
Flow instability conditions, in particular during surge and stall phenomena, have always influenced the operational reliability of turbo-compressors and have attracted significant interest resulting in extensive literature. Nowadays, this subject is still one of the most investigated because of its high relevance on centrifugal and axial compressor operating flow range, performance and efficiency. Many researchers approach this important issue by developing numerical models, whereas others approach it through experimental studies specifically carried out in order to better comprehend this phenomenon. The aim of this paper is to experimentally analyze the stable and unstable operating conditions of an aeronautic turbo-shaft gas turbine axial-centrifugal compressor installed on a brand new test-rig properly designed for this purpose.The test facility is set up in order to obtain i) the compressor performance maps at rotational speeds up to 25,000 rpm and ii) the compressor transient behavior during surge. By using two different test rig layouts, instabilities occurring in the compressor, beyond the peak of the characteristic curve, are identified and investigated.These two types of analysis are carried out thanks to pressure, temperature and mass flow sensors located in strategic positions along the circuit. These measurement sensors are part of a proper control and acquisition system, characterized by an adjustable sampling frequency. Thus, the desired operating conditions of the compressor, in terms of mass flow and rotational speed and transient of these two parameters are regulated by this dedicated control system.© 2016 ASME