气体压强对新型超音速气雾化喷嘴流场的影响  

Effect of Pressure on Flow Field of New Supersonic Speed Gas Atomization Nozzle

作　　者：程江峰[1] 马齐江[2] 王开松[1] 周军鹏[1] 

机构地区：[1]安徽理工大学机械工程学院,安徽淮南232001 [2]滁州学院机械与汽车工程学院,安徽滁州239000

出　　处：《煤矿安全》2017年第2期160-162,166,共4页Safety in Coal Mines

基　　金：安徽省教育厅自然科学基金资助项目(KJ2012A100)

摘　　要：在喷雾降尘中,超音速气流可将液膜剪切为粒径微小的均匀气雾,利用商业CFD软件Fluent模拟了进气压强p_(in)对新型超音速气雾化喷嘴气体流场的影响,以及在激波的作用下喷嘴中心线上压强、速度的变化规律。研究表明:随着p_(in)的增大,流场内激波不断外移,并得到内喷管加速特征曲线;在p_(in)为5 atm(1 atm=101 325 Pa)时,喷管内激波最多,轴线上各项指标脉动剧烈;根据压力曲线可知在p_(in)分别为10 atm和25 atm周围的小区间内,气流以压缩波喷出喷嘴,对喷嘴造成破坏。Supersonic speed airflow can shear liquid film into uniform aerial fog of small particle size in dust suppression by spraying, we use commercial CFD software Fluent to simulate the effect of intake air pressure p~. on gas flow field of new supersonic speed gas atomization nozzle, and the change law of pressure and speed on the axis line of the nozzle under the action of shock wave. Studies show that with the increase of pin, the flow field of shock wave continues to move outward, and get acceleration characteristic curve of internal nozzle; when pin. is 5 atm （1 atm=101 325 Pa）, the number of shock is the maximum in the nozzle with severe pulsating indicators on the axis; according to the pressure curve, we know that the airflow jets out as compression wave and causes the nozzle damage when pin is in the minizone around 10 atm and 25 arm respectively.

关 键 词：煤矿粉尘污染 降尘 超音速 气雾化 激波 特征曲线 

分 类 号：TD714.4[矿业工程—矿井通风与安全]