一种基于湍动能方程的转捩判定方法

张扬; 徐晶磊; 白俊强; 华俊

doi:10.6052/0459-1879-13-231

一种基于湍动能方程的转捩判定方法

doi: 10.6052/0459-1879-13-231

1.
西北工业大学航空学院, 西安710072
2. 北京航空航天大学能源与动力工程学院, 北京100191
3. 中国航空研究院, 北京100012

基金项目: 国家自然科学基金资助项目（11002014）.

详细信息

作者简介:
张扬，博士生，主要研究方向：工程湍流模拟和流动控制.

中图分类号: V211.3
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- 被引次数: 0
出版历程
- 收稿日期: 2013-09-03
- 修回日期: 2013-10-08
- 刊出日期: 2014-01-18

A TRANSITION PREDICTION METHOD BASED ON TURBULENCE KINETIC EQUATION

1.
School of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, China
2. School of Jet Propulsion, Beihang University, Beijing 100191, China
3. Chinese Aeronautics Establishment, Beijing 100012, China

Funds: The project was supported by the National Natural Science Foundation of China (11002014).

摘要

摘要: 转捩现象是阻碍阻力高精度求解的主要问题之一. Menter 和Langtry 所提出的γ-θ转捩模型通过引入涡量雷诺数和间歇因子输运方程来驱动转捩，但是其中很多经验公式的理论立足点有待商榷. 驱使层流转变到湍流依赖的仍然是平均速度的一阶和二阶相关量，它们组合构成了湍动能方程的耗散尺度. 在湍动能方程中做合适的耗散平衡后，仅仅依靠湍动能方程可以有效地捕捉转捩现象. 采用自然转捩和旁路转捩测试算例进行了验证，结果证明该方法与试验值匹配较好，具有一定的工程实用价值.
- 边界层转捩 /
- 湍动能方程 /
- 卡门尺度 /
- 旁路转捩 /
- 湍流耗散率
Abstract: Transition is a chief obstacle for high-accuracy prediction of drag. The γ-θ transition model proposed by Menter and Langtry increases the adaptability by inducing vorticity Reynolds number and intermittency factor, but there are lots of empirical formulae that cannot be told the lodgments of theory. The dissipation term of kinetic energy can be sufficiently constructed with the first and second order correlations of velocity. Transition phenomena can be caught by adding some dissipation terms into the turbulent kinetic energy equation. The method is tested by a natural transition and two bypass transition test cases. The results approve that this method can be applied in engineering turbulence flows simulation.
- boundary-layer transition /
- turbulent kinetic equation /
- von Karman length scale /
- bypass transition /
- turbulent dissipation rate

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参考文献(16)

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