A Study of Under-expanded Moist Air Jet Impinging on a Flat Plate

作     者：Yumiko OTOBE Shigeru MATSUO Masanori TANAKA Hideo KASHIMURA Heuy-Dong KIM Toshiaki SETOGUCHI 

作者机构：Department of Control and Information Systems EngineeringKitakyushu National College of Technology5-20-1ShiiKokuraminami-kuKitakyushu-shiFukuoka 802-0985Japan Department of Mechanical EngineeringSaga University1Honjo-machiSaga-shiSaga 840-8502Japan School of Mechanical EngineeringCollege of Natural ScienceAndong National University388Song Cheon DongAndongKyung PookKorea 

出 版 物：《Journal of Thermal Science》 (热科学学报（英文版）)

年 卷 期：2005年第14卷第4期

页      面：334-340页

核心收录：

学科分类：080704[工学-流体机械及工程] 080103[工学-流体力学] 08[工学] 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）] 

主　　题：compressible flow non-equilibrium condensation impinging jet simulation. 

摘      要：When a gas expands through a convergent nozzle in which the ratio of the ambient to the stagnation pressures is higher than that of the critical one, the issuing jet from the nozzle is under-expanded. If a flat plate is placed normal to the jet at a certain distance from the nozzle, a detached shock wave is formed at a region between the nozzle exit and the plate. In general, supersonic moist air jet technologies with non-equilibrium condensation are very often applied to industrial manufacturing processes. In spite of the importance in major characteristics of the supersonic moist air jets impinging to a solid body, its qualitative characteristics are not known satisfactorily. In the present study, the effect of the non-equilibrium condensation on the under-expanded air jet impinging on a vertical flat plate is investigated numerically in the case with non-equilibrium condensation, frequency of oscillation for the flow field becomes larger than that without the non-equilibrium condensation, and amplitudes of static pressure become small compared with those of dry air. Furthermore, the numerical results are compared with experimental ones.