IMECH-IR  > 力学所知识产出(1956-2008)
剪切湍流的数值模拟及可压缩效应
傅德薰; 马延文; 李新亮; 王强
Source Publication自然、工业与流动——第六届全国流体力学学术会议论文集
2001
Pages99-103
Conference Name第六届全国流体力学学术会议
Conference Date2001-4-1
Conference Place中国上海
Abstract针对湍流的直接数值模拟,在波数空间分析了数值解的行为特征。给出了差分格式精度、网格尺度与可能模拟的雷诺数之间的关系。在此基础上,利用三维可压缩N-S方程的线化扰动方程的数值解,分析了可压缩效应对流动失稳初始发展阶段的影响;利用所得到的可压时间发展平面混合流和可压槽道湍流的直接模拟数据库,从湍动能方程出发,分析了可压缩效应对湍能的输运和耗散特征的影响。指出,可压缩效应所产生的膨胀-耗散项与总耗散量相比是个小量;而扰动压力梯度对局部湍动能的平衡和输运特征有较大影响,但对湍动能的生成和耗散影响不大;压力-膨胀项的变化导致流场中噪声的产生。
Keyword直接数值模拟 时间发展平面混合流 槽道湍流 可压缩效应
Department力学所
Language中文
Document Type会议论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/48130
Collection力学所知识产出(1956-2008)
Recommended Citation
GB/T 7714
傅德薰,马延文,李新亮,等. 剪切湍流的数值模拟及可压缩效应[C]自然、工业与流动——第六届全国流体力学学术会议论文集,2001:99-103.
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