不同压力下细水雾雾场特征参量模拟研究

Research on the atomization characteristics of fine water under different pressure

为研究细水雾雾场特性,定量分析压力对细水雾雾场特征参数的影响,利用计算流体动力学软件Fluent对不同压力下细水雾雾场的粒径分布、速度分布、浓度分布等进行数值分析,利用高速摄像技术和激光粒度分析技术对细水雾雾场特征参数的模拟研究进行实验验证。结果表明:流体从喷嘴喷射到连续相空气中后,喷雾形态均保持为圆锥形。细水雾外部流场速度在截面中心处最大,向边缘处逐渐减小。喷头正下方粒子数量最多,随着距喷头水平距离的增加,粒子数量逐渐减小。

In order to study the atomization characteristics of water mist and analyze the influence of pressure on the characteristic parameters of water mist field quantitatively,computational fluid dynamics software FLUENT was used to analyze the particle size distribution,velocity distribution and concentration distribution of water mist field under different pressure.High-speed camera technology and laser particle size analysis technology were used to verify the simulation research of the characteristic parameters of water mist field.The results showed that after the fluid was injected into the continuous phase air from the nozzle,the spray pattern re⁃mained conical.The velocity of the external flow field of the water mist in the center of the section was the largest,and decreased gradually to the edge.The number of particles under the nozzle was the largest.With the increase of the horizontal distance from the nozzle,the number of particles decreased gradually.