摘要
喷嘴喷流是内冷油腔冷却机理研究重要的初始条件之一。该文利用喷嘴喷流试验确定数值模拟的初始值,通过仿真分析对喷嘴喷流的速度和密度分布特性进行研究,建立了冷却液由喷嘴喷出到油腔入口段的射流模型。结果表明:同一喷流截面,喷流速度和喷流密度随喷流截面的增大而减小;流体喷入空气后,喷流速度随距离增加而衰减,在离喷口较近时,喷流速度衰减比较平缓。研究还显示:射流速度的最大值不是在喷流截面中心;随着喷流发展,速度最大值逐渐向中心靠近,离喷嘴一定距离后,核心区速度最大值在射流中心。
The nozzle jet is one of the important initial conditions for the study of the cooling mechanism of the oil cooling gallery.The initial value of the numerical simulation is determined by the nozzle jet test.The velocity and density distribution characteristics of the nozzle jet are studied by simulation analysis.And the jet model of the cooling fluid from the nozzle outlet to the oil inlet is established.The results show that the same jet cross section,the jet velocity and the jet density decrease as the radial section increases; when the fluid is injected into the air,the jet velocity decays with the increase of the distance.When the jet is close to the nozzle outlet,the jet velocity decay is relatively gentle.The study also shows that the maximum value of jet velocity is not in the center of the jet cross,with the jet development,the maximum gradually close to the center,and the core area of the largest value in the center of the jet after a certain distance.
作者
刘瑞
邓立君
章健
刘世英
LIU Rui;DENG Li-jun;ZHANG Jian;LIU Shi-ying(Binzhou Bohai Piston CO., Ltd, Technology Center, Shandong Binzhou 256600, Shangdong, China;School of Electromechanical Engineering, Shandong Binzhou University, Binzhou 256600, Shangdong, China)
出处
《水动力学研究与进展（A辑）》
CSCD
北大核心
2018年第3期398-404,共7页
Chinese Journal of Hydrodynamics
基金
国家自然科学基金资助项目(青年基金51705028)
山东省自然科学基金资助项目(ZR2016EEB36)~~
关键词
数值模拟
速度分布
密度分布
射流模型
numerical simulation
velocity distribution
density distribution
jet model
