近壁区湍能耗散率输运方程的理论模型

陆利蓬; 陈矛章

近壁区湍能耗散率输运方程的理论模型

北京航空航天大学动力系

基金项目: 攀登计划B资助项目

详细信息

中图分类号: V 231.21; O 357.5
计量
- 文章访问数: 2613
- HTML全文浏览量: 241
- PDF下载量: 898
- 被引次数: 0
出版历程
- 收稿日期: 1998-06-26
- 网络出版日期: 1998-06-30

Theoretical Model for Dissipation-Rate Budgets in Near-WallRegion of a Turbulent Boundary Layer

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

摘要

摘要: 提出在湍流边界层的近壁区采用三维不稳定波来描述湍流扰动速度,然后根据理论模型对湍能耗散率的生成、粘性破坏以及扩散等特性进行了系统定量的计算和分析.理论计算结果与直接数值模拟结果符合较好,特别是在y<10的区域中明显优于传统湍流模型的计算结果.这不仅在理论上有益于对湍流物理机制的了解,而且可能为湍流模型计算开辟一条新的途径.
- 湍流边界层 /
- 耗散 /
- 波
Abstract: Based on the linear hydrodynamic stability theory, a 3-D theoretical model is proposed for the turbulent fluctuations in near-wall region of a turbulent boundary layer. In accordance with the theoretical model, budgets of the the dissipation-rate of turbulent kinetic energy are calculated and its production rate, dissipation and transport are evaluated. Good agreements between the theoretical results and those of DNS are obtained.Especially in the region of y<10 ,the theoretical model is obviously superior to some coventional ones in predicting ability. It is not only beneficial to understanding the physics of turbulence but also, probably, opening a new way for developing turbulence modeling.
- turbulent boundary layer /
- dissipation /
- wave

HTML全文

参考文献(1)

1. 是勋刚. 湍流. 天津:天津大学出版社, 1994 2. Blackwelder R F.Analogies between transitional and turbulent boundary layers.Phys Fluids, 1983, 26(10):2807 3. Kim J,Hussain F.Propagation velocity of perturbations in turbulent channel flow.Phys Fluids,1993,A 5(3):695 4. Benney D J. Finite amplitude effects in an unstable laminar boundary layer.Phys Fluids,1964, 7(3):319 5. Chen Mao-Zhang,Bradshaw P.Calculation of three-dimensional instability modes in a blasius boundary layer.AIAA J,1984, 22(2):301 6. Zhang Z,Lilley G M. A theoretical method of the coherent structure of the turbulent boundary layer in zero pressure gradient.In:BradburyW J,Durst F,Launder B E, et al eds. Turbulent shear flows 3.Berlin:Springer-Verlag,1982 7. Zhou Heng,Xiong Zhongmin.On the mechanism for the generation of the coherent structures in the wall region of a turbulent boundary layer.Science in China, 1995,A38(2):188 8. Zhou Heng,Lu Lipeng.The effect of pressure gradient on the coherent structures in a turbulent boundary layer.Science in China, 1997,A 27 (4) :441 9. Mansour N N,Kim J,Moin P. Reynolds-stress and dissipation-rate budgets in a turbulent channel flow.J Fluid Mech,1988,194:15 10. Daly B J,Harlow F H.Transport equations in turbulence. Phys Fluids, 1970,13:2634 11. Hanjalic K,Launder B E.A Reynolds-stress model of turbulence and its application to thin shear flows.J Fluid Mech, 1972,52:609 12. Hanjalic K,Launder B E.Contribution towards a Reynolds-stress closure for low-Reynolds number turbulence.J Fluid Mech,1976,74:593 13. Myong H K, Kasagi N.A new approach to the improvement of k-ε turbulence model for wall bounded shear flows.JSME International Journal, 1990, Series Ⅱ(33):63 14. Speziale C G,Abid R,Anderson E C.A critical evaluation of two-equation models for near wall turbulence.AIAA Paper, 90-1481,1990

施引文献

资源附件(0)

访问统计