摘要
运用PIV技术测量了Taylor-Couette涡发生器的环隙横截面速度场、环隙子午面速度场;分析了旋转圆筒间流体在不同操作条件下的流动形态以及速度分布规律,探讨了实验条件下泰勒数与各种含涡流场的关系.得到不同转动速度下环隙横截面、环隙子午面的流场特征,进而了解环隙流体的空间运动方式.实验表明:内筒转速越高,圆周运动切向速度越大,环隙中各点的轴向速度和径向速度值都在增大;随着内筒转速增大,涡旋的数量先分离增多,而后又趋于合并减少,Taylor涡的完整性也发生变化,相邻涡之间相互影响,产生了非闭合涡.
In order to study the flow field in the annular gap between rotating cylinders,Particle Image Velocimetry（PIV） technology was applied to measure the cross section and meridian plane of Taylor-Couette reactor.The flow pattern and velocity distributions in different operating conditions of the flow in the annular gap between rotating cylinders were analyzed,and the relationship between the vortex field and Taylor number was discussed,then the flow characteristics of annular cross section and meridian plane under different rotating speed were obtained.The experiment showed that the higher speed of the inner cylinder was,the greater the tangential velocity was,and the axial velocity and the radial velocity were increasing;and with the increasing of the rotational speed,the vortex changed from separation to merger,and the number of it was from more to less;the integrity of the Taylor vortex changed,and the interaction came into being between neighbors and produced non-closed vortex.
出处
《兰州交通大学学报》
CAS
2011年第6期148-153,共6页
Journal of Lanzhou Jiaotong University
基金
国家自然科学基金项目:(50878102)
