北京航空航天大学学报 ›› 2000, Vol. 26 ›› Issue (5): 523-526.

• 论文 • 上一篇    下一篇

近壁区理论耗散率模型的改进

陆利蓬, 苗泽纯, 陈矛章   

  1. 北京航空航天大学 动力系
  • 收稿日期:1999-04-08 出版日期:2000-05-31 发布日期:2010-09-27
  • 作者简介:陆利蓬(1962-),男,天津人,副教授,100083,北京.
  • 基金资助:

    航空科学基金资助项目(99C51074)

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

LU Li-peng, MIAO Ze-chun, CHEN Mao-zhang   

  1. Beijing University of Aeronautics and Astronautics,Dept. of Jet Propulsion
  • Received:1999-04-08 Online:2000-05-31 Published:2010-09-27

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.

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.

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