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压气机试验过程中虽经常需要进行气动、振动、噪声等多种动态信号的测试与分析,但多是孤立进行的,信号的同步测试和统一分析面临困难。因此对一些多物理场耦合现象研究缺乏手段,不能完成细致的描述。本文主要针对这一问题,提出了一种可直接用于工程的多场动态信号统一同步测试分析方案。首先简要描述了动态测试技术在压气机气动非定常现象导致的气动、结构失稳研究方面所起到的作用,说明了针对压气机非定常现象进行多物理场动态信号同步测试分析技术研究的必要性。其次完成了多物理场动态信号同步测试分析方案设计,解决了时间同步、相位修正和同步测试分析等关键问题。最后将其应用于某航空发动机压气机的非定常故障机理研究方面,取得了较好的应用效果,充分展现了该动态测试平台在压气机非定常现象研究方面的广阔应用前景。
Compressor test process often need to conduct a variety of dynamic signals such as aerodynamic, vibration and noise testing and analysis, but mostly in isolation, the signal synchronization testing and unified analysis is facing difficulties. Therefore, some phenomena of multi-physics coupling phenomena are lack of means and can not be described in detail. In this paper, aiming at this problem, this paper proposes a unified synchronous test and analysis scheme of multi-field dynamic signals that can be directly used in engineering. First of all, the role of dynamic testing technology in aerodynamic and structural instability caused by unsteady flow of compressor is briefly described. The necessity of dynamic multi-physics dynamic signal synchronous testing and analysis technology for compressor unsteady phenomena is demonstrated Sex. Secondly, the design of multi-physics dynamic signal synchronization test and analysis program was completed, which solved the key problems of time synchronization, phase correction and synchronization test analysis. Finally, it is applied to the study of the unsteady failure mechanism of an aeroengine compressor, and has achieved good application results. It fully demonstrates the broad application prospect of the dynamic test platform in the study of unsteady flow of compressor.