摘要
通过流动可视化方法观察了两个不同旋转方向涡的干涉过程.实验表明:不同旋转方向的两个涡系相互干涉时合成涡系的强度有减弱趋势,离装涡产生器表面较近的纵向切面上合成涡系的强度减弱程度较小,在离装涡产生器表面较远的纵向切面上合成涡系的强度减弱程度较大,中心切面上合成涡系的强度减弱程度居中.
Flow through an interfered or enhanced heat transfer passage is complicated. When the fluid washing through the prominences in the artery, there will come forth eddies,which can enhance local heat transfer coefficient by hundreds percent. The present research declare that the eddies with different rotate directions will bring interference,and has the tendency to cut down the heat transference. How to observe the interfered phenomenon of the rotated eddy with different directions is significant for us to understand and to research the eddies.By using flow visualization technique,the interactions of two counter-rotating direction vortices are studied.The experiment shows that when the interactions of two counter-rotating vortices decrease the intensity of the synthetic vortex system, the synthetic vortex system intensity over longitudinal slice close to the vortex generations is weak,the synthetic vortex system intensity over longitudinal slice away from the vortex generations is more weak, and the synthetic vortex system intensity over the longitudinal slice immediate is between the above two.
出处
《兰州交通大学学报》
CAS
2004年第3期83-86,共4页
Journal of Lanzhou Jiaotong University
关键词
涡
涡干涉
流动显示
vortices
interactions of vortices
flow visualization
