结构参数对喷射器内二维流场的影响  

INFLUENCE OF STRUCTURAL PARAMETERS UPON TWO-DIMENSIONAL FLOW FIELD IN THE EJECTOR

作　　者：陈修娟[1] 肖立川[1] 许景伟[1] 

机构地区：[1]江苏工业学院机械与能源工程学院,江苏常州213016

出　　处：《热力发电》2009年第3期40-43,47,共5页Thermal Power Generation

摘　　要：运用计算流体力学软件Fluent对喷射器内二维流场进行数值模拟计算。分析了第二喉管径向和轴向尺寸以及吸收室轴向长度对喷射器性能的影响。计算结果表明,在一定的设计工况下,混合室及吸收室轴向长度尺寸的改变会极大地影响波系结构;存在一个最佳的混合室直径对应于最大的喷射系数。给出了最佳几何参数下的主要物理特征。The two- dimensional flow field in an ejector has been numerically simulated and calculated by using FLUENT software, the influence of radial and axial dimensions in secondary throat as well as the axial length of absorption chamber upon the performance of ejector being analysed. Results of calculation show that the variation in dimensions of axial length in mixing chamber and absorption chamber under certain designed operating condition may extremely affect the shock structure. There is an optimal diameter of the mixing chamber, corresponding to the maximum spray coefficient. The main physical charoteristies under optimal geometric parameters have been given.

关 键 词：喷射器 结构参数 二维流场 喷射系数 激波 

分 类 号：TK222[动力工程及工程热物理—动力机械及工程]