摘要
利用ANSYS FLUENT软件,采用欧拉多相流模型对圆锥长直管段喷嘴外流场进行建模与仿真,观察不同参数下的仿真结果并比较,结果表明:随着压力增大,外流场入口速度增大,磨料和水的速度均有衰减,磨料速度的衰减速率要小于水的衰减速率,但不同压力下速度衰减趋势基本相同;随着喷嘴直径的增大,射流速度核心区范围略有增大,外流场速度衰减速率在不同喷嘴直径下基本相同;增大射流冲击面积不宜通过增大喷嘴直径来实现;随着磨料体积分数的提高,磨料速度的衰减速率先减小后增大。
A simulation about the external flow field of conical long straight pipe nozzle was conducted by ANSYS FLUENT and Eulerian multiphase flow model. Results in different parameters were compared and indicated that： With the pressure increase, the inlet velocity in the external flow field would increase. Abrasive velocity and water velocity both decayed, and abrasive velocity＇s attenuation rate was less than the water velocity ＇ s, but in different pressure, the velocity attenuation rate was almost the same.The water jet velocity core region was promoted a little with the increase of the nozzle diameter, and in different nozzle diameter the velocity attenuation rate was almost the same. It is not suitable that promoting the water jet impact area by increasing the nozzle diameter. The attenuation rate of abrasive velocity would firstly decrease and then promote due to the enhancing of the abrasive volume fraction.
出处
《仪器仪表用户》
2017年第11期15-20,10,共7页
Instrumentation
基金
中国石油化工项目:川气东送应急抢修设备研究(G8603-12-2S-0057)
关键词
磨料水射流
数值模拟
外流场
abrasive water jet
simulation
external flow field
