摘要
基于计算流体动力学软件Fluent,采用体积分数(Volume of Fraction,VOF)方法结合雷诺应力湍流模型(Reynolds Stress Model,RSM),研究了高压力情况下压力旋流式雾化喷嘴的雾化流场特性。从仿真结果分析得到的雾化锥角与实测值基本吻合,水流在出口处的射出速度随工作压力的提高而提高,最高射出速度从2 MPa时的48.81 m/s提高到8 MPa时的98.73 m/s,4 MPa后射出速度提高幅度趋缓;水流的射出运动由切向速度和轴向速度主导;喷嘴的雾化锥角大小随工作压力的提高没有明显的变化。考虑工作压力的提升会带来额外的能耗和成本上升,工作压力宜选用4~6 MPa。
Through having Fluent software based,a VOF(volume of fraction)method combined with RSM turbulence model(Reynolds stress model),the characteristics of high-pressure atomization flow field in pressure-swirl atomizer was investigated.Numerical simulation results show that,the spray-cone angle generally complies with the measured value.With the increase of working pressure,the maximal spray velocity of fluids at the exit increases from 48.81 m/s at 2 MPa to 98.73 m/s at 8 MPa,and after a 4 MPa,the increased range of the spray velocity increases slowly.Both tangential velocity and axial velocity dominates the fluid ejection and the spray-cone angle seems without significant change while the pressure becomes increased.Considering the extra cost and energy consumption incurred by the increment of operating pressure,a 4 to 6 MPa working pressure would be recommended.
作者
陈锦琛
李风雷
肖志瑜
CHEN Jin-chen;LI Feng-lei;XIAO Zhi-yu(National Engineering Research Center of Near-Net-Shape Forming for Metallic Materials,South China University of Technology)
出处
《化工机械》
CAS
2021年第5期699-705,716,共8页
Chemical Engineering & Machinery
基金
广东省科技攻关项目(2014B010129003)。
