摘要
利用粒子图像测速技术(particle image velocimetry,简称PIV)和涡量分析原理对调节阀不同工况下的流场信息进行测量,研究了进口压力对液压调节阀速度场、涡量场及湍动能的影响。结果表明:调节阀节流口处有对冲射流,其在阀芯头部下游汇合后形成向下游的整体喷射;节流口下游的油液轴向速度先减小后增大,在喉部末尾处附近趋于稳定;在靠近壁面区域油液径向流动速度都较低,在流道中心区域流动速度较高;阀芯头部和下游流道存在由速度梯度引起的介质回流旋涡,高涡量区域主要分布在阀芯头部和壁面处,强的正涡与负涡呈2条斜形宽带分布;阀芯头部为高涡量区且具有贴壁特征,壁面附近高涡量区向下游延展;随着调节阀进口压力的增大,阀口流量、流场高速分布区域、旋涡的强度和尺度以及湍动能均随之增大。
Particle image velocimetry(PIV)technology and vorticity analysis are used to measure the flow field in the regulating valve for coal liquefaction under different working conditions,and the influences of inlet pressure on the radial and axial velocity distribution in the regulating valve are also discussed.The results show that the jet formed by the effect of throttling orifice converges and form a whole towards the downstream.The axial velocity of the oil decreases firstly and then increases downstream,and tends to keep stable near the throat.The radial flow velocity of the oil is lower near the wall,while it is higher in the center area of the flow channel.There are vortices caused by the velocity gradient in the spool head and downstream,the strong positive vortices and negative vortices show two oblique wide band distributions.One of the high vorticity area is close to the head of the spool attached to the wall,while the other high vorticity area is mainly concentrated in the middle of the flow channel towards downstream.Furthermore,with the increasing inlet pressure,each of the flow rate,the high-speed distribution area and the intensity of the vortex increases.
作者
刘秀梅
彭佳佳
贺杰
李贝贝
张雨佳
向少斌
刘威威
LIU Xiumei;PENG Jiajia;HE Jie;LI Beibei;ZHANG Yujia;XIANG Shaobin;LIU Weiwei(School of Mechatronic Engineering,China University of Mining and Technology Xuzhou,221116,China;School of Electrical and Control Engineering,Xuzhou Institute of Technology Xuzhou,221018,China)
出处
《振动．测试与诊断》
EI
CSCD
北大核心
2024年第2期313-319,411,共8页
Journal of Vibration,Measurement & Diagnosis
基金
江苏省优势学科建设资助项目(PAPD)。
关键词
调节阀
粒子图像测速
速度场
涡量场
湍动能
regulating valve
particle image velocimetry technology
velocity field
vorticity field
urbulent kinetic energy
