论文部分内容阅读
本文以跨音轴流单转子压气机为研究对象,对65%和98%额定转速下,不同等离子体激励强度的扩稳效果进行研究。结果表明,在一定转速下,等离子体激励强度越高,扩稳效果越好;相同等离子激励强度下,转速越高,扩稳效果越差。通过对该单转子机匣壁面轴向剪切应力的分析,发现等离子体激励的扩稳机制是将泄漏流与主流交界面位置推向叶片通道下游,抑制泄漏流在叶片前缘的溢出。在此基础上,本文提出了一种利用靠近失速的小流量工况下的泄漏流与主流交界面位置预判等离子体激励效果的方法。该方法由于不需要计算到失速边界,因此可以快速初判等离子激励的相对扩稳效果,为跨音环境下等离子扩稳方案的设计提供指导。
In this paper, the transonic axial single-rotor compressor is taken as the research object, and the effect of different plasma excitation intensities is studied at 65% and 98% of rated speed. The results show that under a certain rotational speed, the higher the plasma excitation intensity, the better the stabilizing effect. Under the same plasma excitation intensity, the higher the rotational speed, the worse the stabilizing effect. Through the analysis of the axial shear stress on the single-rotor casing wall, it is found that the mechanism of plasma excitation stabilizing is to push the leakage flow interface with the mainstream to the downstream of the blade passage to suppress the overflow of the leakage flow at the leading edge of the blade. On this basis, this paper presents a method of predicting the plasma excitation effect by using the position of the leakage flow and the main interface near the stall with small flow rate. Since this method does not need to calculate the stall boundary, the relative stability enhancement effect of plasma excitation can be rapidly initialized, which provides guidance for the design of plasma stabilization scheme in transonic environment.