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首页> 外文期刊>Journal of the Institution of Engineers (Inida) >Effect of Throttle Conditions on Fluid Dynamic Instabilities in Axial Compression Systems
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Effect of Throttle Conditions on Fluid Dynamic Instabilities in Axial Compression Systems

机译：节流条件对轴向压缩系统中流体动力不稳定性的影响

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摘要

An analysis of the effect of throttling on surge and rotating stall has been done to develop an insight on the possible behaviour of instabilities in a compression system subsequent to an initial disturbance. The ability to predict the nature of instabilities are highly important from the compressor design point of view since their consequences could result in widely varying difficulties with the fluid dynamic performance of the systems. The present paper discusses, in an approximate manner, the effect of throttle position in a compressor performance curve which is shown to create widely varying behaviour on fluid dynamic instabilities once the stall line is crossed. The physical reason for the behaviour is explained and the well-established Moore-Greitzer compression system model have been used for the present study. The results shown in this paper clearly elucidates the dominating effect of the operating parameter, the throttle, on the development of flow instabilities like rotating stall and surge. The trends of their behaviour reported in this paper are found to have a good agreement with the experimental results. As these results inform about the nature of instabilities that one could expect as the stall line is crossed, appropriate preventive measures could be adopted to avoid/control such instabilities.
机译：已经对节流对喘振和旋转失速的影响进行了分析，以深入了解初始扰动后压缩系统中不稳定的可能行为。从压缩机设计的角度来看，预测不稳定性本质的能力非常重要，因为其后果可能导致系统的流体动力学性能出现广泛变化的困难。本文以粗略的方式讨论了节气门位置在压缩机性能曲线中的影响，该曲线表明，一旦越过失速线，就会对流体动力不稳定性产生广泛变化的行为。解释了该行为的物理原因，并且本研究使用了完善的Moore-Greitzer压缩系统模型。本文显示的结果清楚地阐明了操作参数节气门对流动失稳（如旋转失速和喘振）发展的主要影响。发现本文报道的它们的行为趋势与实验结果具有很好的一致性。由于这些结果说明了越过失速线可能发生的不稳定性的性质，因此可以采取适当的预防措施来避免/控制这种不稳定性。

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