受限条件下线形对文丘里引射器性能影响的数值分析  

Numerical analysis of the performance impact of linear-to-venturi ejectors under restricted conditions

作　　者：何子煜 徐杰 王子兵 HE Zi-yu;XU Jie;WANG Zi-bing

机构地区：[1]华北理工大学冶金与能源学院,河北唐山063210

出　　处：《节能》2024年第9期66-69,共4页Energy Conservation

摘　　要：采用某厂0.8 WM燃气引射器的模型进行分析,通过对不同基础结构参数及不同工况下的引射器进行不同线形改进,研究线形等几何参数对引射器性能的影响。采用直线形、双曲线形、椭圆Ⅰ形及椭圆Ⅱ形共4种线形,其中传统直线形引射器作为对照组。通过Solidworks进行软件建模并通过AnsysFluent软件进行数值模拟。受限空间采用实际生产中的炉膛大小,尺寸为1 m2×1.5 m的椭圆形燃烧炉膛。经过数值模拟分析最终得出在引射器入口段长度为30 mm,引射器为椭Ⅰ形,保持引射流体入口速度范围不变,改变喷嘴直径为5 mm时阻塞效应临界点后移,引射系数更高。Analyzing a 0.8 WM gas ejector model from a certain factory.By improving the ejector with different linear forms under various basic structural parameters and working conditions,the study investigates the impact of geometric parameters such as linear form on the performance of the ejector.A total of four linear forms are used,including the straight-line type,hyperbolic type,elliptic type I,and elliptic typeⅡ,with the traditional straight-line type ejector serving as the control group.Solidworks is used for software modeling,and numerical simulation is conducted using the Ansys Fluent software.The restricted space adopts the actual furnace size used in production,with dimensions of 1 m×1.5 m for an elliptical combustion furnace.After numerical simulation and analysis,it is ultimately concluded that when the inlet section length of the ejector is 30 mm,and the ejector is of the elliptic type I,while keeping the inlet velocity range of the ejecting fluid unchanged,changing the nozzle diameter to 5 mm results in a shift of the critical point of the blockage effect to the rear,leading to a higher ejector coefficient.

关 键 词：引射器 引射系数 数值模拟 流场 

分 类 号：TK477[动力工程及工程热物理—动力机械及工程]