Numerical Analysis of Turbulent Sonic Jets from Two-Dimensional Convergent Nozzles  

作　　者：Hideo KASHIMURA Yuya MASUDA Yoshiaki MIYAZATO Kazuyasu MATSUO 

机构地区：[1]Department of Control and Information Systems Engineering,Kitakyushu National College of Technology 5-20-1,Shii,Kokuraminami-ku,Kitakyushu,Fukuoka,802-0985,JAPAN [2]Department of Mechanical Systems Engineering,The University of Kitakyushu,1-1,Hibikino,Wakamatsu-ku,Kitakyushu,Fukuoka,808-0135,JAPAN

出　　处：《Journal of Thermal Science》2011年第2期133-138,共6页热科学学报（英文版）

摘　　要：The numerical analysis of a turbulent sonic jet from a two-dimensional convergent nozzle has been carried out using the compressible k-? turbulence model and TVD finite difference scheme. Numerical conditions have been varied over a range of operating pressure ratios from 1.893 to 6.0 which cover the jet flow conditions from correctly expanded to underexpanded. Numerical flow visualization of sonic jet structure using the computer schlieren, a relation between shock cell length in the jet with the operating pressure ratio and the pressure distribution along jet centerline are obtained. Also, a transition process of a two-dimensional sonic jet from correctly expanded to underexpanded conditions is shown in detail and a flow model of jet structure is proposed.The numerical analysis of a turbulent sonic jet from a two-dimensional convergent nozzle has been carried out using the compressible k-？ turbulence model and TVD finite difference scheme. Numerical conditions have been varied over a range of operating pressure ratios from 1.893 to 6.0 which cover the jet flow conditions from correctly expanded to underexpanded. Numerical flow visualization of sonic jet structure using the computer schlieren, a relation between shock cell length in the jet with the operating pressure ratio and the pressure distribution along jet centerline are obtained. Also, a transition process of a two-dimensional sonic jet from correctly expanded to underexpanded conditions is shown in detail and a flow model of jet structure is proposed.

关 键 词：Sonic nozzle Underexpanded jet Shock cell length κ-ε turbulence model Numerical analysis 

分 类 号：V211[航空宇航科学与技术—航空宇航推进理论与工程]