摘要
为模拟不可压非定常小扰动流场,本文将非定常流场分解为定常平均流场和以简谐振荡为运动规律的非定常小扰动的叠加,理论推导了不可压非定常小扰动流场的控制方程,发展了一种求解不可压非定常小扰动流场控制方程的差分格式。计算结果表明,振荡叶栅非定常流场的压力响应在叶栅前缘较大。叶片间相角对非定常压力响应的相位有着决定性的影响,对非定常压力响应的绝对值有一定影响。振荡叶栅的振幅对叶片表面的非定常压力分布影响较小,但对非定常压力响应的绝对值影响较大。计算结果与实验结果基本一致,说明本方法是一种工程适用的近似方法。
? The unsteady flow is taken as the steady flow and the small disturbance flow to simulate the unsteady incompressible flow field. The governing equations of unsteady incompressible flow field in a computational plane have been given out, and a difference scheme has been developed. The results show that the unsteady pressure response is large in the oscillating cascade leading edge. The blade vibrating interference has great effect on the unsteady pressure. The unsteady pressure distribution changes little with the change of the vibrating amplitude, but the unsteady pressure response amplifude changes greatly.
出处
《清华大学学报(自然科学版)》
EI
CAS
CSCD
北大核心
1997年第8期48-51,共4页
Journal of Tsinghua University(Science and Technology)
关键词
不可压
非定常
小扰动
数值模拟
incompressible
unsteady
small disturbance
numerical simulation