A Study on Boundary Layer Flow on a Rotating Disk with Orbital Motion

本研究的目的是研究具有轨道运动的旋转圆盘上的三维边界层流动。设计并制造了类似自旋涂布机的圆盘旋转装置，但圆盘是绕轨道旋转的。采用油流法对旋转圆盘边界层内的气流进行了可视化。用热线法测量了边界层的速度场。结果发现，圆盘表面粗糙度的增大和液滴液体流速的增大使附面层的转变变得遥远。采用PTV（粒子跟踪测速法）研究了从旋转圆盘边缘射出的液滴散射行为。

The purpose of this study is to investigate three-dimensional boundary layer flow on a rotating disk with orbital motion. The disk rotating device as like a spin-coater is designed and is built, however the disk spins with orbital motion. The air flow in the boundary layer on the rotating disks is visualized by the oil flow method. The velocity field in the boundary layer is measured by hot-wire. As a result, it is found that the increases in the surface roughness of disk and the flow rate of droplet liquid remote the boundary layer transition. The behavior of droplets scatter shot from the edge of a rotating disk are investigated by using PTV (particle tracking velocimetry).