摘要
构造了8阶精度的群速度控制型差分格式.根据激波捕捉能力及对小尺度分辨能力对格式系数进行了优化.采用该格式对可压缩均匀各向同性湍流进行了直接数值模拟,所计算的最大湍流马赫数达到0.95.相同计算条件下的结果与他人结果吻合较好,说明了格式在捕捉激波的同时对湍流小尺度有较好的分辨能力.
A new difference scheme called GVC8 is developed, and the scheme are used in the direct numerical simulation of decaying compressible turbulence. In the DNS we have successfully improved the turbulent Mach number up to 0.95. The statistical quantities thus obtained at lower turbulent Mach number agree well with those from previous authors start with same initial conditions, but they are limited to simulate at lower turbulent Mach numbers due to so-called start-up problem. Energy spectrum of compressible turbulent flow is analyzed.
出处
《力学学报》
EI
CSCD
北大核心
2004年第1期79-83,共5页
Chinese Journal of Theoretical and Applied Mechanics
基金
基金重大研究计划"空天飞行器的若干重大基础问题"资助项目(90205025)
国家自然科学基金资助项目(19872070
170176033)
国家重点基础研究专项经费资助项目(G1999032805)~~
