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Numerical Simulation of High Lift System Configuration

ZHU Zi-qiang, CHEN Ying-chun, WU Zong-cheng,CHEN Ze-min (Ministry of Education Key Laboratory of Fluid Mechanics, Beijing University of Aeronautics and Astronautics, Beijing 100083, China)  
The inviscid and viscous flow physics around a high lift configuration and the complexity of its flow phenomena and the difficulty of its description are analyzed and discussed.The RANS equations method for aerodynamic numerical simulation of a high lift configuration in 2D and 3D cases,the results of computation and their comparisons with experimental data are investigated in detail.The results in 2D case show that the calculated and experimental results of the pressure distribution and velocity profile are well agreed,but some differences exist in the results of maximum lift coefficient(C_(Lmax)).The situation of C_(Lmax) in 3D case is similar to that in 2D case.The influential elements on the calculated results including computational grid,turbulence model,approximation description of the configuration shape et al are analyzed.The importance of the transition model research to increase the computational accuracy is specially pointed out.The importance and the urgency of pursuing research on numerical simulation method and developing engineering semi-empirical method to estimate C_(Lmax) for a high lift configuration are explained.
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