摘要
湍流模型是目前解决工程中湍流问题不可缺少的工具。然而它终究是建立在简化与假设的基础上的,其准确性必须经过实际的检验。对超声速边界层,由于缺乏系统的实验数据,检验工作很难做。本文以BL模型为例,通过可压缩湍流边界层的三个典型算例,与直接数值模拟(DNS)的结果作对比。分析了其成功及不足之处,以及影响其精度的若干因素,并检验了用BL模型预测转捩位置的有效性。
At the present moment, turbulent modeling is a necessary tool in solving engineering turbulent problems. However, it is based on certain simplified assumptions, the accuracy of the results must be verified. For supersonic boundary layers, the examination may be difficult, because of the lack of systematic experimental data. In this article, BL model is used to study three typical cases of compressible turbulent boundary layer, for which, data from direct numerical simulation （DNS） are available for comparison. Its advantages and shortcomings, as well as factors influencing its accuracy are analyzed, and the proposed method of predicting the transition location has also been tested.
出处
《空气动力学学报》
EI
CSCD
北大核心
2009年第1期102-107,共6页
Acta Aerodynamica Sinica
基金
国家自然科学重点基金资助项目(10632050)
关键词
BL
模型
直接数值模拟
可压缩湍流边界层
BL model
direct numerical simulation
compressible turbulent boundary layer
