摘要
为了研究调节阀内部的气液两相流变化规律,开发调节阀空化场可视化实验平台并研究其内部空化流分布特征。该调节阀入口压力为2.5~4.0 MPa,背压为1.0 MPa。通过空化场可视化实验表明:随入口压力增加,调节阀节流口处低压区域逐渐扩大,促进了空化区域的发展;调节阀空化特征具体表现为空化流中间段空泡数密度最大、环流道出口部分以及空化流尾流部分的空泡数密度相对较低,空穴气-液交界面尾部轮廓比较模糊,下游流道中偶尔会出现脱落的游离型空泡。该研究将数值仿真和可视化方法相结合应用于探究调节阀实际生产中的空化问题,为理论教学和工程实际应用提供了新思路。
In order to study the changes in gas-liquid two-phase flow inside the control valve,a visualization experimental platform for the cavitation field is developed to explore the distribution characteristics of cavitation flow inside the control valve with inlet pressure of 2.5-4.0 MPa and back pressure of 1.0 MPa.The visualization experiment of the cavitation field shows that with the inlet pressure increases,the low-pressure area at the throttle port of the control valve gradually expands,it promotes the development of the cavitation area.The cavitation characteristics of the control valve are manifested that the density of the cavitation number in the middle section of cavitation flow is the largest,the density of the cavitation number in the outlet part of annular channel and the wake part of cavitation flow is relatively low.And the tail contour of cavitation gas-liquid interface is relatively indistinct,these detached free bubbles would be found occasionally in the downstream.This study combines numerical simulation and visualization methods to explore the cavitation problem in the actual production of control valve,it provides new ideas for theoretical teaching and practical engineering applications.
作者
贺杰
刘秀梅
李贝贝
乔淑云
王树臣
HE Jie;LIU Xiumei;LI Beibei;QIAO Shuyun;WANG Shuchen(School of Electrical and Control Engineering,Xuzhou University of Technology,Xuzhou 221018,Jiangsu,China;School of Mechatronic Engineering,China University of Mining and Technology,Xuzhou 221116,Jiangsu,China)
出处
《实验室研究与探索》
CAS
北大核心
2023年第7期72-77,共6页
Research and Exploration In Laboratory
基金
国家自然科学基金项目(51875559)
江苏省自然科学基金项目(BK20171189)
江苏省现代教育技术研究立项课题(2022-R-100886)
徐州工程学院教研课题(YGJ-SZ-21128)。
关键词
液压调节阀
空化流场
可视化实验台
工作参数和结构参数
hydraulic control valve
cavitation flow field
visual experimental platform
working parameters and structural parameters
