二维超音速湍流混合特性研究

MIXING FEATURES OF TWO-DWENSIONAL SUPERSONIC TURBULENT FLOW

关键词:  超音速流  二维流  数值模拟  湍流模型

Key words:  Supersonic flow  Two dimensional flow  Numerical simulation  Turbulence model

摘要:

着重讨论顺流喷射情况下的超音速混合的流场特征及影响因素。简要介绍了顺流喷射混合的研究现状。同时，探讨了不同的来流参数对流场特征的影响及混合机理。计算采用了一种二阶ＴＶＤ格式有限体积法及Ｂ－Ｌ湍流模型求解二维湍流Ｎ－Ｓ方程。结果表明：所采用的计算方法能成功地抑制非物理振荡，适用于二维超音速内流的湍流混合特性研究。

Abstract:

The flow characteristics and the factors influencing supersonic mixing are discussedemphatically. We briefly introduce the current reasearch situation for parallel injection. The mixingmechanism and the effects of different inflow parameters are investigated. In present calculation weadopted a two-order TVD finite volume method and Boldwin-Lomax turbulent model for solving twodimensional turbulent Navier-Stokes equations. The results show that the numerical method used herecan restrain non-physical ocsilation successfully and is suitable to study the turbulent mixing featuresof two-dimensional supersonic internal flow.