论文部分内容阅读
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。
In the spray dust reduction, the supersonic airflow can shear the liquid film into a uniform gas mist with a small particle size. The commercial CFD software Fluent was used to simulate the effect of the inlet pressure p_ (in) on the gas flow field of a new supersonic aerosol nozzle , And the variation of pressure and velocity on the center line of the nozzle under the action of shock wave. The results show that as the p_ (in) increases, the shock wave in the flow field moves out continuously, and the acceleration curve of the inner nozzle is obtained. When p_ (in) is 5 atm (1 atm = 101 325 Pa) According to the pressure curve, it can be seen from the pressure curve that the jet flows out of the nozzle with a compressional wave in the small interval around 10 atm and 25 atm, respectively, which causes damage to the nozzle.