摘要
为了验证直接数值模拟三维中低流动雷诺数湍流的正确性和可靠性,该文采用拟谱方法对三维平面混合层流场进行了直接数值模拟,并将数值模拟得到的结果与 Lasheras 等的平面混合层经典实验结果进行了对比。定量比较了流场不同断面的流向速度平均值、脉动强度、混合层的动量厚度及涡量厚度等流动量。结果表明,直接数值模拟的结果与实验结果吻合良好,证明了直接数值模拟中低三维混合层的正确性和有效性,为扩大直接数值模拟的应用打下了基础。
In order to check the correctness and reliability of direct numerical simulation of the three-dimensional turbulence with the moderate or low flow Reynolds number, this paper adopts the pseudospectral method to direct numerically simulate(DNS) the three-dimensional plane mixing layer. The DNS results are compared with the classic experimental results of Lasheras et al on the plane mixing layer. The streamwise mean velocity profiles, the longitudinal velocity fluctuation profiles, the momentum thickness and the vorticity thickness obtained by DNS are mulually contrasted quantitatively. Consequently, the DNS results are in good agreement with the experimental ones. It proves that the DNS of three-dimensional mixing layer is correct and reliable, that lays a foundation for extending the applications of DNS.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2004年第3期183-186,共4页
Proceedings of the CSEE
基金
国家自然科学基金重点项目(50236030)
国家重点基础研究发展规划资助项目(G19990222)~~
关键词
气固两相流
三维混合层
数值模拟
实验验证
流向涡
湍流
Direct numerical simulation
Experimental verification
Three-dimensional mixing layer
Velocity profiles
Momentum thickness
