近壁区理论耗散率模型的改进

陆利蓬; 苗泽纯; 陈矛章

近壁区理论耗散率模型的改进

北京航空航天大学动力系

基金项目: 航空科学基金资助项目(99C51074)

详细信息

作者简介:
陆利蓬(1962-),男,天津人,副教授,100083,北京.

中图分类号: V 231.2^＋1; O 357.5
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- 文章访问数: 2892
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- 被引次数: 0
出版历程
- 收稿日期: 1999-04-08
- 网络出版日期: 2000-05-31

Improvement on the Theoretical Model for Dissipation-rate Budgets in Near-wall Region of a Turbulent Boundary Layer

Beijing University of Aeronautics and Astronautics,Dept. of Jet Propulsion

摘要

摘要: 提出了在边界层的近壁区,采用共振三波的理论模型描述湍流边界层相干结构,由此解决了对称三维波理论模型不能处理三阶相关量的问题,根据新的理论模型对ε方程逐项进行计算和分析.与原理论模型计算结果相比,本文理论结果与直接数值模拟(DNS)符合更好.
- 湍流边界层 /
- 耗散 /
- 波
Abstract: A symmetric resonant-triad theoretical model is proposed for the turbulent coherent structures in near-wall region of a turbulent boundary layer,sothe terms of triple-correlation can be analyzed theoretically. In accordance with the new theoretical model, budgets of the dissipation-rate of turbulent kinetic energy are calculated and its production rate, dissipation and transportation are evaluated. The new theoretical results are in better agreements with DNS than those by simple 3-D symmetric wave model. It shows that the theoretical method proposed could correctly embody the physical mechanism of near wall region turbulence and there is a possibility of opening a new way for near-wall turbulence modeling.
- turbulent boundary layer /
- dissipation /
- waves

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参考文献(1)

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