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采用Ansys Fluent软件并基于Schnerr与Sauer空化模型,对出口压力小于10Pa平口喷嘴内部的空化流动进行了模拟,研究了喷射压力和喷嘴直径对喷嘴内部蒸汽体积和湍动能分布的影响。结果表明,高喷射压力(10 MPa)对喷嘴内部蒸汽体积的作用减弱,喷射压力为10MPa时,喷嘴出口径向上的蒸汽体积大于其它喷射压力下的蒸汽体积,可获得较好的空化效果;喷嘴内的湍动能随喷射压力的增加而增加;喷嘴直径对喷嘴内部的空化流动有很大的影响,喷嘴直径越小所产生的空化流动越强烈,对比其它直径的喷嘴,直径为0.1 mm的喷嘴在出口处的蒸汽体积和湍动能较大,有助于雾化质量的提高。
Using Ansys Fluent software and based on Schnerr and Sauer cavitation models, the cavitation flow inside a nozzle with an outlet pressure less than 10Pa was simulated. The influence of injection pressure and nozzle diameter on the steam volume and turbulent kinetic energy distribution inside the nozzle was studied. The results show that the effect of high injection pressure (10 MPa) on the volume of steam inside the nozzle is weakened. When the injection pressure is 10 MPa, the volume of steam in the radial direction of nozzle outlet is larger than the volume of steam under other injection pressures, The turbulent kinetic energy in the nozzle increases with the increase of injection pressure. The nozzle diameter has a great influence on the cavitation flow in the nozzle. The smaller the diameter of the nozzle, the stronger the cavitation flow. Compared with other diameter nozzles, the diameter is 0.1 The nozzle at the exit of the steam volume and turbulent kinetic energy is larger, contribute to improve the quality of atomization.