新型气-固喷射器结构参数及性能研究  

Study of structure parameters and performance of a new type of gas-solid ejector

作　　者：苏永生[1] 吴爱华 屈铎 SU Yongsheng;WU Aihua;QU Duo(College of Power Engineering,Naval Univ.of Engineering,Wuhan 430033,China;School of Energy and Power Engineering,Huazhong Univ.of Science and Technology,Wuhan 430074,China)

机构地区：[1]海军工程大学动力工程学院,武汉430033 [2]华中科技大学能源与动力工程学院,武汉430074

出　　处：《海军工程大学学报》2023年第1期74-80,共7页Journal of Naval University of Engineering

摘　　要：在工业清洗中,气固两相流清洗方式越来越受重视。设计了一种结构简单、加工方便的新型气固喷射器,针对5种不同结构参数的喷射器,采用CFD对其进行数值模拟,利用拉格朗日和欧拉法相结合的数值模拟方法,通过对比模拟结果找出优化方向,并将所设计的模型3(颗粒入口孔位置位于扩张段出口处、扩张段长度8 mm、出口孔径5 mm)作为最终的优化结果。对优化后的模型进行变工况分析,分别改变颗粒直径及进口压力,模拟结果显示,颗粒直径越大引射能力越好,但是颗粒出口速度越小;对于模型3,在进气压力为0.9 MPa时引射能力达到峰值,但颗粒出口速度随进气压力的增大而增大。In industrial cleaning,gas-solid two-phase flow cleaning method attracts more and more attention.A new type of gas-solid ejector with simple structure and convenient processing was introduced.Compared with the traditional ejector,its processing cost is low and the cleaning effect is good.In order to optimize its structure,five different structural parameters were proposed.CFD was used to simulate it,and through comparative analysis,the optimization direction was found out.Consequently,the model 3 proposed(particle inlet located at expansion segment outlet,length of expansion segment being 8 mm and diameter of outlet being 5 mm)was taken as the final optimization result.Variable working condition analyses on the optimized model was performed,whereby the particle diameter and inlet pressure were changed respectively.The simulation results show that the larger the particle diameter is,the better the ejection ability is,whereas the particle outlet velocity is the smaller;and for model 3,the ejection ability reaches the peak when the inlet pressure is 0.9 MPa,but the particle outlet velocity increases with the increase of the inlet pressure.

关 键 词：气固喷射器 工业清洗 CFD 结构优化 

分 类 号：TH451[机械工程—机械制造及自动化]