作者:韩桂华，葛宁，侯进军，李大尉，赵孟石，裴禹，姚鸿宾，姚立明
Authors:HAN Gui-hua,GE Ning,HOU Jin-jun,LI Da-wei,ZHAO Meng-shi,PEI Yu,YAO Hong-bin,YAO Li-ming摘要:摘要:以孔板空化器为研究对象，推导了球形空泡的运动方程；将气液两相质量传输、流体流入与流出控制容积引起的气含率变化考虑在内，推导出孔板空化器内流体气含率变化方程。以空化模型为依据，通过数值模拟以10-5s时间步长获得孔板通道100ms内瞬态空化中气泡分布、压力、速度特性。在孔板通道内建立径向截面利用气相体积流率分布进一步证明流体空化状态的稳定性。通过模拟和实验对两种不同通流截面积孔板结构在不同压差下对空化效果的影响进行验证。结果表明，可以以气相体积流率来衡量空化效果，增加孔板通道的数量比改变孔径更能影响空化效果。
Abstract:Abstract:Based on the orifice cavitation device as the research object, and the motion equation of spherical cavitation is derived; the gas holdup changes caused by the gas-liquid two-phase mass transfer, fluid inflow and outflow control volume are taken into consideration, and the orifice cavitation is derived. The change equation of fluid gas holdup in the vessel, based on the cavitation model, the bubble distribution, pressure and velocity characteristics of the transient cavitation in the orifice channel within 100ms are obtained through numerical simulation with a time step of 10-5s. Establishing a radial section in the orifice channel and using the gas volume flow rate distribution to further prove the stability of the fluid cavitation state. Through simulation and experiment, the influence of two different flow crosssectional area orifice structures on the cavitation effect under different pressure differences is verified. The results show that the cavitation effect can be measured by the volume flow rate of the gas phase. Increasing the number of orifice channels can affect the cavitation effect more than changing the pore diameter.
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孔板空化器内流体空化特性研究
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