摘要
采用离散涡方法对平面射流流场进行了数值模拟。显示了平面射流中的大尺度涡结构的卷起、旋转和合并过程,模拟结果揭示了平面射流中的大尺度拟序结构的时空演化特征和发展变化规律。得到了定点的瞬时速度和流场的时均速度分布,时均速度场的计算结果和实验值吻合,瞬时速度分布揭示了平面射流拟序结构的非定常、不稳定的非线性特征。
The flow field of planar jet is simulated by discrete vortex method. The rolling up, rotating and merging processes of large-scale vortex structures in the planar jet are displayed and the temporal and spatial evolution characteristics are disclosed by the simulation results. The instantaneous velocity at the fixed position and the mean velocity of the fluid field are computed. The results of time-averaged velocity simulation are in accordance with the values of the experiments and the unsteady and instable nonlinear characteristics of the large-scale coherent structures in the planar jet are displayed from the instantaneous velocity distributions.
出处
《华东理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2005年第3期319-322,361,共5页
Journal of East China University of Science and Technology
基金
国家重点基础研究发展规划(2004CB217703)
"863"计划(2003AA521021)
关键词
平面射流
离散涡方法
拟序结构
数值模拟
planar jet
discrete vortex method
coherent structure
numerical simulation
