湍流特征频率的模式理论计算  

Numerical Calculating for Character Frequency of Turbulence Using Turbulence Methods

作　　者：徐江荣[1] 李超[1] 

机构地区：[1]杭州电子科技大学应用数学与工程计算研究所,浙江杭州310018

出　　处：《杭州电子科技大学学报（自然科学版）》2008年第4期73-76,共4页Journal of Hangzhou Dianzi University：Natural Sciences

基　　金：浙江省自然科学基金资助项目(Y105028)

摘　　要：该文在重新研究模式理论中特征频率概念的基础上,利用标准k-ε模型中湍流粘性定义,获得湍流特征频率的计算公式。运用标准k-ε模型和特征频率公式,数值模拟了不同尺寸的管流和圆形射流湍流场中的特征频率分布,定量比较表明,湍流场的特征频率计算是有效的。Based on the theory of turbulence models, the character frequency of turbulence is re - studied, a new equation of the character frequency of turbulence is gained by using the conception of turbulent eddy viscosityin Standard k - ε model. And then the character frequency of turbulence are numerical simulated by standard k - ε model and the new equation of frequency, the character frequency of turbulence of the pipe flows and pipe jet are gained, the numerical results agree with the experimental results, it is shown that the calculating method of the character frequency of turbulence is effective.

关 键 词：标准两方程模型 特征频率 湍流 

分 类 号：TK121[动力工程及工程热物理—工程热物理]