摘要
从线化的三维可压非定常欧拉方程组(时间相关的双曲型方程组)出发,将非定常流场的振荡现象看作是若干频率成份的简谐振动的叠加,根据实际的研究对象,通过合理的数学方法,得到一个有广泛应用背景的振荡欧拉流场求解的简化方法,并通过比较,证明这一简化方法不但简单易行,而且具有较高精度。
From the three dimensional compressible linear unsteady Euler equations, a simplified method of calculating the flow field can be accomplished by a valid mathematical way. This simplified method is of a strong background in engineering. In the method, the osillation phenomenon of flow is regarded as the summation of some harmonics of different frequencies. By comparing the results of this method with other one, it is proved that this method is not only simple, but also accurate.
出处
《振动工程学报》
EI
CSCD
1999年第4期475-480,共6页
Journal of Vibration Engineering
基金
国家自然科学基金!重大项目(编号19990510)
国家自然科学基金!(编号:59606004)
关键词
振荡叶栅
非定常流动
欧拉方程
流场
振荡
oscillating blade
unsteady flow
turbomachinery
stability
three dimensional flow
