杆式声雾化器雾化特性的试验研究

EXPERIMENTAL INVESTIGATION ON SPRAY CHARACTERISTICS OF ACOUSTIC ATOMIZER

就杆式声雾化器的流体动力参数和几何参数对其雾化特性的影响进行了试验研究。试验在常温、常压下进行。用印痕法测量液雾尺寸分布特性，测量误差＜±５％。试验结果表明，声雾化器的ＳＭＤ与空气压力成反比，与液体流量成正比，共振腔尺寸Ｌδ对ＳＭＤ的影响最大。液雾分布近似符合Ｒ－Ｒ分布，其Ｒ－Ｒ分布指数范围与大多数喷嘴相同。

The effects of the flow and geometric pa rameters of an acoustic atomizer on its spray characteristics are considered.The experiments were carried out at ambient air pressure and temperature.An impress ion method for measuring distributions o f spray droplets was used.The error of t he measurement is less than ±5%,It is sh own that the SMD of droplets is inversel y proportional to air pressure and propo rtional to liquid flow rate.The influenc e of cavity dimension L on SMD appears t o be of significance.The distribution of droplets nearly fits to Rosin Rammler e xpression,The range of exponent q is ide ntical with that of conventional atomize rs.