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首页> 外文会议>2002 ASME International Mechanical Engineering Congress and Exposition , Nov 17-22, 2002, New Orleans, Louisiana >Particle Image Velocimetry and Heat Transfer Measurements of a Disk at High Rotational Speeds
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Particle Image Velocimetry and Heat Transfer Measurements of a Disk at High Rotational Speeds

机译：高速旋转磁盘的颗粒图像测速和传热测量

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摘要

Flow field and local heat transfer measurements were conducted on a rotating disk in an open environment for a variety of rotational speeds ranging from 1500 to 5500 rpm. Two-dimensional particle image velocimetry (PIV) measurements were conducted on the flow field above the surface of the rotating disk. Experiments were made on a rotating disk twice as large as a computer hard disk drive and therefore, the flow conditions may be comparable with a computer disk rotating with a speed up to 20,000 rpm. Velocity field, local heat transfer, and temperature distribution are presented as the result of this investigation. Transient liquid crystal technique was employed for heat transfer measurements, while a back calculation scheme was used to obtain the temperature distributions. Heat transfer measurements were made for r/R > 0.4 which excludes the central hub holding the disk assembly. Results reveals that heat transfer increases with a smaller slope near the corner of the hub, while it increases sharply near the outside edge of the disk.
机译：流场和局部传热测量是在开放环境中的旋转盘上进行的，转速范围为1500到5500 rpm。在旋转盘表面上方的流场上进行了二维粒子图像测速（PIV）测量。在比计算机硬盘驱动器大两倍的旋转磁盘上进行了实验，因此，其流动条件可以与转速高达20,000 rpm的计算机磁盘相媲美。速度场，局部传热和温度分布是该研究的结果。瞬态液晶技术用于传热测量，而反向计算方案用于获得温度分布。对r / R> 0.4进行传热测量，其中不包括固定磁盘组件的中央轮毂。结果表明，在轮毂拐角附近，热传递以较小的斜率增加，而在磁盘的外边缘附近则急剧增加。

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