摘要
采用时间3阶、空间5阶的高精度、高分辨率格式,对稳态来流条件下超声速开式空腔的非定常振荡特性进行数值研究。通过二维和三维空腔压力变化、声压级、振荡频率等参数的计算和分析表明:空腔内存在典型的压力振荡,振荡有近似的周期性,且变化规律较复杂,三维空腔对主振荡频率影响较小,但振荡强度有较大的不同。
The unsteady oscillatory characteristics in supersonic cavity are numerically studied in the steady inflow condition. 5 order WENO scheme and 3 order Runge-Kutta algorithm are used. Through numerically calculating and analyzing the pressure changing procedure, sound pressure level, oscillatory frequency in 2D and 3D cavity, it shows that there is typical pressure oscillatory in cavity. The oscillatory has approximate cycle, but the law of cycle is very complex. 3D cavity exerts little effect on the main oscillatory frequency, but the oscillatory intensity is quite different in 2D and 3D.
出处
《国防科技大学学报》
EI
CAS
CSCD
北大核心
2004年第6期1-4,共4页
Journal of National University of Defense Technology
基金
国家部委基金资助项目(413130101)
