Turbulent Flow and Heat Transfer of Liquid in a Cylindrical Rotating Container with a Stationary Concentric Cylinder

1.实验装置由一个半径为14.5-15.2cm的圆柱形旋转容器和一个半径为5- 11 cm的同心固定内筒组成。用激光多普勒测速仪测量了两圆柱间充水流速的三个分量.计算结果表明，流场分为两个区域。一个是从中心到内圆柱半径处的内部区域，该区域的流动类似于两平行圆盘之间的流动，当用内圆柱半径和旋转圆柱的角速度归一化时，存在类似的速度分布。另一个是外侧区域，这里的流动类似于库埃特流动.速度的归一化垂直分量的分布与雷诺数无关。速度的绝对值约为切向速度的1/100。根据测量的速度分布计算出径向速度，并计算出r-z平面内的二次流流型.三个分量的标准化湍流强度分布与雷诺数、两圆柱底部之间的距离和测点高度无关.雷诺应力在两圆柱底部之间的区域几乎为零，在内圆柱半径稍靠外的径向点处有一个峰值。

1. The experimental apparatus consists of a cylindribal rotating container, 14.5-15.2cm in radius, and concentric stationary inner cylinder, 5-llcm in radius. Three components of the velocity of water filled between two cylinders were measured with a laser Doppler anemometer.2. The result indicates that the flow field is divided into two regions. One is inner region from the center to the point at inner cylinder radius, where the flow is similar to that between two parallel disks and there exists a similar velocity distribution when it is normalized by the radius of inner cylinder and the angular velocity of rotating cylinder. The other is outer region where the flow is similar to Couette flow.3. The distribution of the normalized vertical component of velocity is independent on the Reynolds number. The absolute value of the velocity is about 1/100 of that of the tangential velocity. The radial velocity was calculated from these measured velocity distributions, and a secondary flow pattern in r-z plane was calculated.4. The normalized turbulence intensity distributions of three components are independent on the Reynolds number, the distance between two cylinder bottoms and the height of measuring point.5. The value of the Reynolds stress is nearly zero in the region between two cylinder bottoms and has a peak at slightly outer radial point of the radius of inner cylinder.