Numerical Investigation of Centerline Curvature Effects on a Compact S-shaped Intake  

作　　者：Enliang Huang Shengfeng Zhao Zhijun Lei Jianxiong Kang Xingen Lu Junqiang Zhu 

机构地区：[1]Key Laboratory of Light-duty Gas-turbine, Institute of Engineering Thermophysics, Chinese Academy of Sciences,Beijing, 100190, China [2]University of Chinese Academy of Sciences, Beijing, 100190, China

出　　处：《Journal of Thermal Science》2012年第5期413-419,共7页热科学学报（英文版）

摘　　要：Taking into account stealth, structure and maintenance, ultra-compact S-shaped intake has been widely used in modem vehicles. In this paper a series of steady numerical simulation were carried out to investigate the complex flow mechanism in s-shaped intake, particular attention was given to examining the effect of centerline curvature on the performance and flowfield of an ultra-compact S-shaped intake. In order to validate the multi-block model, the computational results for Royal Aircraft Establishment intake 2129-M2129 which had modest centerline cur- vature distribution were corrected with available experimental test data. The numerical simulation results agreed fairly well with the experimental data, and the computational method was then used to investigate the effects of different centerline curvature distributions on performance and flow field in compact S-shaped intake. Detailed analyses of the flow visualization had exposed the different flow topologies between the cases with different cen- terline curvature. It was found that different centerline curvature distributions changed the initial location and the size of separation bubble, as well as the strength of two counter-rotating vortices at the entrance of engine.

关 键 词：S-shaped Intake Secondary Flow Centerline Curvature Separation bubble Counter-rotating Vortices 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术] TU375.101[自动化与计算机技术—计算机科学与技术]