摘要
提出了一种气液耦合激振方式,通过控制气脉冲与液压油形成的通气空化泡产生的空化作用对液压系统内部污染物进行分散与剥离。建立了波动发生器作用下的通气空化泡动力学方程,数值模拟了激励气压对气泡空化过程的影响,揭示了通气空化泡发生、生长和破灭的动力学过程。通过ANSYS Fluent计算了流场压力及分布云图。开发了气液耦合激振试验系统,采用压力变送器及数据采集卡对流场的激振压力进行采集及滤波处理。试验数据与仿真结果表明:随着通气压力的升高,空化效应增强,气泡空化过程从稳态向瞬态演化,最终使流体激振压力增大。数值模拟与试验结果能较好吻合,表明气液耦合激振下的通气空化泡所产生的气泡空化过程具有可控性,为复杂液压系统的在线不拆卸清洗研究提供参考。
A gas-liquid coupling excitation method is proposed.By controlling the cavitation generated by the ventilation bubble formed by the gas pulse and the hydraulic oil,the pollutants in the hydraulic system can be dispersed and peeled off.The kinetic equation of ventilating cavitation under the action of wave generator is established.The influence of excitation pressure on bubble cavitation process is numerically simulated,revealing the dynamic process on growth and bursting of ventilation cavitation bubble and the flow field pressure and distribution cloud map are calculated by ANSYS Fluent.Meanwhile,the gas-liquid coupling excitation test system is developed,through which the flow field excitation pressure are collected by pressure transmitter and data acquisition,and the data is digitally filtered.Then the measured experimental data are compared with the simulation results.The results show that with the ventilation pressure increasing,the cavitation effect will be raised,and the bubble cavitation process will evolve from steady state to transient,which will eventually increase the fluid excitation pressure.The numerical simulation results are in good agreement with the experimental results,which shows that the cavitation process generated by the ventilated cavitation under the gas-liquid coupling excitation is controllable,providing a theoretical basis and experimental method for the on-line cleaning of complex hydraulic system without disassembly.
作者
张慧贤
郭兆锋
杨海军
布占伟
ZHANG Huixian;GUO Zhaofeng;YANG Haijun;BU Zhanwei(College of Mechanical Engineering,Luoyang Institute of Science and Technology,Luoyang 471023,China;Shanghai Best Automation Control Equipments Co.,Ltd.,Shanghai 201818,China)
出处
《重庆理工大学学报（自然科学）》
CAS
北大核心
2021年第1期89-96,共8页
Journal of Chongqing University of Technology：Natural Science
基金
国家自然科学基金资助项目(U1404513)
河南省高等学校重点科研项目(20A460020)
河南省重点研发与推广专项(202102210333)。
关键词
气液耦合激振
通气空化
气脉冲
空化泡
波动发生器
gas-liquid coupling excitation
ventilation cavitation
gas pulse
cavitation bubble
pulse generator
