摘要
建立了一种分析动态压力－温度组合畸变下多级轴流压缩系统气动稳定性新方法。导出了基于ＢｉｄｉａｇｏｎａｌＳｃｈｅｍｅ的数值计算方法。应用新方法对三级实验压气机进行了详细的数值分析，给出了压缩系统进口动态压力、动态温度，动态压力一温度组合畸变与压缩系统稳定性之间的定量关联关系，同时给出了动态畸变下压缩系统失稳的定量预测方法。
In China's aero - engine research and development, we now need to study in detail the combined effect of dynamic distortions on stability of multistage axial compression system.Though we have seen U. S. reports on such effect[1￣3], none of them explained much about how to establish the necessary computation model. We now make use of such a model established by us in 1995[4] to obtain the results presented here.Eqs. (1) through (3), which can describe such a model, are taken from Ref. [4]. Abidiagonal scheme is developed for solving eqs. (1) through (3). We call it“bidiagonal”for the reason that the difference scheme of one diagonal - predictor -is given by eqs. (4)through (9) and the difference scheme of the other diagonal-corrector -is given by eqs.(10) through (15).The results of computation for a certain type of multistage axial flow compressor are given in Figs.1 through 3 and Tables 1 and 2. Fig. 1 shows the variation of πK*, pressure ratio, with ψ, flow coefficient. In Fig. 1, the symbol * denotes the unstable limit. The numerical results given in Tables 1 and 2 make it possible to predict when aerodynamic instability occurs. The curves given in Figs. 2 and 3 make it possible to predict at which stage instability occurs first.
出处
《西北工业大学学报》
EI
CAS
CSCD
北大核心
1996年第2期255-258,共4页
Journal of Northwestern Polytechnical University
基金
航空科学基金
