摘要
基于多相爆炸装置液雾燃爆的实验要求,设计了一套二次脉冲气动雾化系统,以水为液体介质对其喷雾过程进行了实验研究。通过数字图像处理技术和激光多普勒法对气液输送管段的流型结构,喷雾室内的气液掺混过程、喷雾张角、索特平均直径D32及尺寸分布进行了实验测定,得到了高压气室压力0.8-3.3 MPa、储液室液体50-500mL、电磁阀开启时长450ms条件下,气液输送管段呈现环状液膜流型为主,气液掺混过程为二次脉冲气动雾化,雾化张角在138°-170°之间,500ms时刻液滴的索特平均直径为61μm。
A double pulse pneumatic spray system was designed based on the requirements of multiphase explosion expriments.Water was employed to study the spray characteristics of the system.The two phase flow pattern in delivery pipe,the gas-liquid mixing process of spray room,the angle of spray,the Sauter mean diameter D32 and the particle size distribution were measured via digital image processing technology and laser Doppler methods,respectively.The experimental results prove that the annular two-phase flow is the main flow structure in the gas and liquid delivery pipe when the initial pressure is in the range of0.8-3.3MPa,the water is between 50-500 mL and the spray duration is fixed at 450 ms.In the meantime,double pulse pneumatic spray was found in gas and liquid mixing process,corresponding to the spray angle between 138°-170°and the mean D32 of 61μm at 500 ms,respectively.
出处
《高压物理学报》
CAS
CSCD
北大核心
2015年第5期347-355,共9页
Chinese Journal of High Pressure Physics
关键词
流体力学
气液两相流
脉冲气动
fluid mechanics
gas-liquid two phase flow
double pulse pneumatic spray
作者简介
王悦（1975-），女，博士，主要从事安全监控与事故再现研究．E-mail：726572905@qq．com
