喷嘴螺旋倾角对雾化性能影响的试验研究

通过试验研究以理解螺旋喷嘴的雾化性能。利用激光粒度分析仪和高速摄像机试验研究了喷雾锥角,喷嘴流量,喷雾射程,粒子速度,雾滴的平均直径(SMD)等性能参数。结果表明,在同一喷射压力下,液体的喷射距离、喷嘴出口雾化角和雾粒的轴向速度都随着喷嘴螺旋倾角的增大而减小,然而,喷嘴流量和雾粒SMD随着喷嘴螺旋倾角的增大而增大。在系统喷射压力为2 MPa时,螺旋倾角对喷嘴流量的影响最小,其减小幅度仅为0.004 L/s;且在距喷嘴口25 cm处,30°螺旋喷嘴在系统压力为3 MPa时,雾粒SMD最小,最小为30.04μm;在系统喷射压力为3 MPa时,螺旋倾角对雾粒轴向速度的影响最大,其速度变化幅度为10.3 m/s。

Experimental Study on Influence of Nozzle Spiral Inclination Angle on Atomization Performance

Through experimental research to understand the atomization performance of the spiral nozzle, the performance parameters such as spray cone angle, nozzle flow rate, spray range, particle velocity, and average diameter of droplets(SMD) were studied by laser particle size analyzer and high speed camera. The results show that under the same injection pressure, the jet distance of the liquid, the atomization angle of the nozzle outlet and the axial velocity of the fog particle decrease with the increase of the nozzle inclination angle. However, the nozzle flow and fog particle SMD increase with the increase of the spiral inclination of the nozzle. When the system injection pressure is 2 MPa, the spiral tilt angle has the least influence on the nozzle flow rate, and the reduction is only 0.004 L/s;and at 25 cm from the nozzle, the 30° spiral nozzle at the system pressure is 3 MPa, fog particle SMD is the smallest, with a minimum of 30.04 m;when the system injection pressure is 3 MPa, the spiral tilt angle has the greatest influence on the axial velocity of the fog particle, and the change range of its velocity is 10.3 m/s.