摘要
采用有限体积法求解Faver平均N S方程,对三维、粘性、非定常、不可压微作动器外流场进行数值模拟。计算结果揭示了微射流产生、发展与耗散的过程,和实验中观察到的现象比较吻合。旋涡对沿展向的不稳定性是涡环破裂、旋涡对的相干性消失的主要原因。二次涡的发现为以后研究微射流旋涡对的细微结构打下良好的基础。
The Faveraveraged NS equations were solved using the finite volume method for the micro jet actuator external flow field that is incompressible, three dimensional, timedependent, as well as viscous. The result shows character as well as creating, developing and dissipation process of the micro jet. The results show good agreement with experimental results. The numerical study reveals the spanwise instability of vortex pairs, resulting in the breakdown of the coherent vortex structure. The secondary vortex was captured. It is very beneficial to study the microscopic structure of the micro jet.
出处
《空气动力学学报》
CSCD
北大核心
2003年第2期244-249,共6页
Acta Aerodynamica Sinica
基金
西北工业大学博士创新基金资助项目(5211102 0800 6114101)
