热科学学报（英文版）2003，Vol.12Issue(2)：132-137,6.
Characteristics of the Mach Disk in the Underexpanded Jet in which the Back Pressure Continuously Changes with Time
Characteristics of the Mach Disk in the Underexpanded Jet in which the Back Pressure Continuously Changes with Time
T. Irie 1T. Yasunobu 2H. Kashimura 2T. Setoguchi3
作者信息
- 1. Department of Mechanical Engineering,Kitakyushu National College of Technology,Shii,Kokuraminami-ku,Kitakyushu 802-0985,Japan
- 2. Department of Control and Information Systems Engineering,Kitakyushu National College of Technology,Shii,Kokuraminami-ku,kitakyushu 802-0985,Japan
- 3. Department of Machanical Engineering,Saga University,Honjo,Saga 840-8502,Japan
- 折叠
摘要
Abstract
When the high-pressure gas is exhausted to the vacuum chamber from the nozzle, the underexpanded supersonic jet contained with the Mach disk is generally formed. The eventual purpose of this study is to clarify the unsteady phenomenon of the underexpanded free jet when the back pressure continuously changes with time. The characteristic of the Mach disk has been clarified in consideration of the diameter and position of it by the numerical analysis in this paper. The sonic jet of the exit Mach number Me=1 is assumed and the axisymmetric conservational equation is solved by the TVD method in the numerical calculation.The diameter and position of the Mach disk differs with the results of a steady jet and the influence on the continuously changing of the back pressure is evidenced from the comparison with the case of steady supersonic jet.关键词
underexpanded jet/sonic jet/regular reflection/Mach reflection/Mach disk/TVD methodKey words
underexpanded jet/sonic jet/regular reflection/Mach reflection/Mach disk/TVD method分类
能源科技引用本文复制引用
T. Irie,T. Yasunobu,H. Kashimura,T. Setoguchi..Characteristics of the Mach Disk in the Underexpanded Jet in which the Back Pressure Continuously Changes with Time[J].热科学学报（英文版）,2003,12(2):132-137,6.
