首页> 外文期刊>Journal of the Institution of Engineers (Inida) >Forced Convection Across Horizontal Hot Cylinder Using Slotted Deflector Plate
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Forced Convection Across Horizontal Hot Cylinder Using Slotted Deflector Plate

机译:使用开槽导流板在水平热缸上强制对流

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According to Kirchoff-Helmhotlz solution for flow across a horizontal cylinder, the boundary layer separates at an angle of 55° from horizontal plane, so due to this separation phenomenon of boundary layer, the heat transfers from the upper side of a hot cylinder is minimum. Heat transfer from upper side can be increased by preventing the separation of boundary layer. Here we delay the separation of boundary layer by using a slotted deflector plate. Due to this accelerated air passes over upper side of the cylinder. The optimum distance at which the plate is to be kept from the cylinder is found out through this experiment. This experiment is also carried out by varying the width of the slot, the heat input to the cylinder and the velocity of flow of the air. We find that this method is more effective at higher temperatures and the highest temperature difference achieved was 20 % which is significant for cooing industrial equipments.
机译:根据Kirchoff-Helmhotlz求解水平圆柱体的解决方案,边界层与水平面的夹角为55°,因此,由于边界层的这种分离现象,热圆柱体上侧的传热最小。通过防止边界层的分离,可以增加从上侧的热传递。在这里,我们通过使用开槽的偏转板来延迟边界层的分离。因此,加速的空气越过气缸的上侧。通过该实验,可以确定板与圆柱体之间的最佳距离。该实验还通过改变缝隙的宽度,输入到气缸的热量和空气的流速来进行。我们发现该方法在较高温度下更有效,并且实现的最高温差为20%,这对于冷却工业设备非常重要。

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