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内孔式旋转空化发生器的数值计算研究

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内孔式旋转空化发生器的数值计算研究
Numerical Study on the Cavitating Flow in a Rotary Cavitation Generator
投稿时间:2015-10-09
DOI:10.15918/j.tbit1001-0645.2017.01.001
中文关键词:水力空化旋转结构优化
English Keywords:hydrodynamic cavitationrotational structureoptimization
基金项目:国家自然科学基金资助项目(51479002)
作者单位
刘影北京理工大学 机械与车辆学院, 北京 100081
李先林北京理工大学 机械与车辆学院, 北京 100081
陈泰然北京理工大学 机械与车辆学院, 北京 100081
王国玉北京理工大学 机械与车辆学院, 北京 100081
黄彪北京理工大学 机械与车辆学院, 北京 100081
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中文摘要:
采用数值计算方法研究了内孔式旋转空化发生器的空化机理,并讨论了不同孔结构对其空化流动的影响.研究结果表明:当孔内压力降低到水的饱和蒸汽压时,孔内将发生剧烈空化现象;孔内存在明显的水汽交界面,由于转子的高速旋转,交界面附近水汽交换显著;结构参数中孔深L、孔径D和孔倾角α对空化区域大小及水汽交换效果有显著的影响,在转速为2 850 r/min的条件下,孔倾角为30º,孔径为23 mm,孔深为35 mm时空化和水汽交换效果最好.
English Summary:
In order to investigate the mechanism of cavitation in an inner hole rotary cavitation generator, a numerical method was proposed to analyze the effect of different hole structures on the cavitation flow. Results show that when the pressure was reduced to the saturated vapor pressure of the water, cavitation will occur in the hole. Due to the high speed rotation of the rotor, there exist significant mass transfer between the water and vapor. The structural parameters of the cavitation generator, the depth L, diameter D and inclination angle α of hole directly affect the cavitation area and the transfer process between water and vapor. At a certain speed, an optimum value of the structural parameters exists. Under the condition of rotational speed of 2 850 r/min, the cavitation area and the transfer process between water and vapor seems more significant when the inclination angle of hole is 30 degree, the diameter is 23 mm and the depth is 35 mm.
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