流体动力式超声波喷嘴雾化特性的实验研究

Experimental study of atomization characteristic of fluid dynamic ultrasonic nozzle

根据超声波雾化机理和经过反复试验，研制了流体动力式超声波雾化喷嘴。分析了流体动力式超声波雾化的原理与特点，分别用水和180号重油作为介质对喷嘴雾化特性进行了实验，测试了不同雾化空气压力、液体压力条件下沿喷嘴轴向的粒径分布，并对雾化特性进行了理论分析。用水作为雾化介质时，雾化粒径在实验条件下基本保持在10—16μm；用180号重油作为雾化介质时，即使在入口温度50℃的低温下，雾化粒径在实验条件下亦保持在10-15μm范围内，证明该喷嘴对重油有良好的雾化效果，具有较大的应用价值。

According to ultrasonic atomization mechanism and trial and error, the fluid dynamic ultrasonic nozzle is developed. The principle and feature of atomization of the nozzle are analyzed. Its atomization characteristic experiment is carried out by using water and 180# heavy oil as medium respectively to test the granularity distribution along the nozzle axis in different gas pressure and liquid pressure. The theoretical analysis of the atomization characteristic is also performed. It is discovered that the atomized particle diameters are between 10 μm and 16 μm when using water as medium, while the particle diameters are kept between 10 μm and 15 μm even if the temperature at the entrance is only 50 ℃ when using 180# heavy oil as medium. Thus it is proved that the nozzle shows good atomization effect for heavy oil with great application value.