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Investigation of flow characteristics from an inclined jet on a heated rotating disk

机译:从加热的旋转盘上的倾斜射流研究流动特性

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Impinging jet directly hits the object surface to achieve drying, heating or cooling purpose. Jet flow and rotation parameters will affect the flow field. In this paper, the flow pattern and velocity distribution of the inclined jet on a rotating disk under different experimental conditions were investigated using particle image velocimetry (PIV). The investigated parameters included: jet Reynolds number (173-979), jet angle (45 degrees, 60 degrees, and 90 degrees), rotational Reynolds number (0-21,000), and Grashof number (0-300,000). The result showed that inclination angle could cause unsymmetrical flow velocities in the radial direction of the stationary disk. Also, the flow above the heated stationary disk was influenced by the vortex flow generated by the buoyancy force at lower inlet flow rate. However, the flow pattern was not affected by the jet angle at lower jet flow rate on the high-speed rotating disk. The flow pattern can be characterized by using a series of dimensionless parameters, including rotational Reynolds number, jet Reynolds number, and Grashof number. (C) 2018 Elsevier Ltd. All rights reserved.
机译:撞击射流直接撞击物体表面以达到干燥,加热或冷却的目的。射流和旋转参数将影响流场。本文利用粒子图像测速技术研究了不同实验条件下旋转盘上倾斜射流的流动方式和速度分布。研究的参数包括:喷射雷诺数(173-979),喷射角(45度,60度和90度),旋转雷诺数(0-21,000)和Grashof数(0-300,000)。结果表明,倾斜角可能会导致固定盘径向上的流速不对称。而且,在较低的入口流速下,由浮力产生的涡流影响了加热的固定盘上方的流。但是,在高速旋转盘上,以较低的射流流量,射流角不受射流角的影响。可以通过使用一系列无量纲参数来表征流型,这些参数包括旋转雷诺数,射流雷诺数和Grashof数。 (C)2018 Elsevier Ltd.保留所有权利。

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