Numerical Simulations on Geometrical Properties of Wall-attaching Transonic Jet

作     者：Hu Dapeng Chen Zuzhi Dai Yuqiang Chen Shengtao 

作者机构：Gas Wave Refrigeration Research and Popularization Center of Dalian University of Technology Dalian 116012 China 

出 版 物：《Engineering Sciences》 (中国工程科学（英文版）)

年 卷 期：2008年第6卷第1期

页      面：38-42页

学科分类：080706[工学-化工过程机械] 080103[工学-流体力学] 08[工学] 080104[工学-工程力学] 0807[工学-动力工程及工程热物理] 0801[工学-力学（可授工学、理学学位）] 

基　　金：Chinese 863 National Program Foundation(No.2006AA05Z216) 

主　　题：wall-attaching transonic jet parallel plat plates geometrical properties attachment distance 

摘      要：Effects of operating conditions and device s geometrical sizes on geometrical properties of wall-attaching transonic jet between two parallel plat plates are numerically simulated. Conclusions are as follows: 1) Upriver part of the wall-attaching jet s center streamline is in good accordance with parabola; 2) When both gas inlet pressure and outlet pressure as well as their ratio are not too high ( the outlet pressure is less than 10 MPa and the pressure ratio is less than 3), the center streamlines of the wall-attaching jet with the same pressure ratio coincide with each other very well, and the deflection degree of the center streamline decreases with rise of the pressure ratio; 3) The deflection degree of the jet s center streamline decreases with either broadening of nozzle s throat or rise of wall offset; 4) With rise of the pressure ratio, attachment distance of the jet increases, but the increase rate descends; 5) The attachment distance ascends with rise of either the nozzle s throat or the wall offset.