这时可能产生的问题包括：振荡、负读数以及通常不稳定读数。
Some of the problems that may result include oscillations, negative readings and generally unstable readings.
得到如下一些重要结论：1。不稳定区域密度波振荡为有限的持续振荡。
The following conclusions are obtained: 1. the density wave in an unstable area develops a finite continuous oscillation.
采用离散旋涡法对振荡叶栅传播失速不稳定流场进行了数值模拟。
The unsteady flow in an oscillating cascade with propagating stall was simulated numerically with discrete vortex method.
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