摘要
为了研究文丘里管型孔板参数变化对空化效果影响,以理论建模描述空化机理及模拟条件,入口压力和孔截面积为变量参数进行单因素数值模拟,气含率为空化效果表征,研究结果表明:空化集中发生在文丘里管段扩散段处,且随着入口压力增加,文丘里管型孔板空化效果上升;当入口压力大于1.1 MPa时涡流空化现象逐渐增强;孔截面积增加文丘里管型孔板空化效果增强,相同截面积下多通道的空化效果更好。最后通过电导率空化水实验对变量参数进行实验研究,得到与数值模拟相同的结论,证明数值模拟的可靠性和准确性。
In order to study the influence of the parameter changes of venturi tube orifice plate on the cavitation effect,the cavitation mechanism and simulation conditions were described by theoretical modeling.The inlet pressure and hole cross-sectional area were variable parameters for single-factor numerical simulation,and the gas volume fraction rate was the cavitation effect characterization.The research results show that the cavitation is concentrated at the diffusion section of the venturi tube,and the cavitation effect of venturi tube orifice plate increases with the increase of inlet pressure;the vortex cavitation phenomenon gradually increases when the inlet pressure is greater than 1.1 MPa;the hole cross-sectional area increases with the increase of venturi tube orifice plate cavitation effect.The cavitation effect of venturi tube orifice plate is enhanced by increasing the cross-sectional area,and the cavitation effect of multiple channels is improved under the same cross-sectional area.Finally,the experimental investigation of the variable parameters is conducted by conductivity cavitation water experiment,yielding the same conclusion as the numerical simulation,proving the reliability and accuracy of the numerical simulation.
作者
李大尉
谷世杰
韩桂华
杨旭东
LI Dawei;GU Shijie;HAN Guihua;YANG Xudong(Institute of Advanced Technology,Heilongjiang Academy of Sciences,Harbin 150020,China;School of Mechanical and Power Engineering,Harbin University of Science and Technology,Harbin 150080,China;Harbin Electric Power Equipment Company Limited,Harbin 150036,China)
出处
《哈尔滨理工大学学报》
北大核心
2024年第6期13-21,共9页
Journal of Harbin University of Science and Technology
基金
黑龙江省自然科学基金(E2016040)
国家自然科学基金(51375123)
黑龙江省省属科研院所科研业务费项目(ZNBZ2023GJS07).
关键词
文丘里管型孔板
空化效果
数值模拟
气含率
电导率空化水实验
venturi tube orifice plate
cavitation effect
numerical simulation
gas volume fraction
conductivity cavitation water experiment
