Boundary-layer transition prediction using a simplified correlation-based model

作     者：Xia Chenchao Chen Weifang 

作者机构：School of Aeronautics and Astronautics Zhejiang University 

出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)

年 卷 期：2016年第29卷第1期

页      面：66-75页

核心收录：

学科分类：080103[工学-流体力学] 08[工学] 080104[工学-工程力学] 080203[工学-机械设计及理论] 0802[工学-机械工程] 0801[工学-力学（可授工学、理学学位）] 

基　　金：supported by the State Key Development Program for Basic Research of China(No.2014CB340201) 

主　　题：Boundary-layer transition Computational fluiddynamics Correlation Transition model Turbulence model 

摘      要：This paper describes a simplified transition model based on the recently developed correlation-based γ - Reot transition model. The transport equation of transition momentum thick- ness Reynolds number is eliminated for simplicity, and new transition length function and critical Reynolds number correlation are proposed. The new model is implemented into an in-house com- putational fluid dynamics （CFD） code and validated for low and high-speed flow cases, including the zero pressure flat plate, airfoils, hypersonic flat plate and double wedge. Comparisons between the simulation results and experimental data show that the boundary-layer transition phenomena can be reasonably illustrated by the new model, which gives rise to significant improvements over the fully laminar and fully turbulent results. Moreover, the new model has comparable features of accuracy and applicability when compared with the original 3＇ - Reot model. In the meantime, the newly proposed model takes only one transport equation of intermittency factor and requires fewer correlations, which simplifies the original model greatly. Further studies, especially on separation- induced transition flows, are required for the improvement of the new model.