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Experimental studies on the effect of tube inclination on nucleate pool boiling

机译:管子倾角对核池沸腾影响的实验研究

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Experiments were conducted to study the effect of tube inclination on nucleate pool boiling heat transfer for different tube diameters and surface roughness values. The results show that as the tube is tilted from the vertical to the horizontal, the temperatures at the top and bottom (with respect to circumference) increase and decrease, respectively. The increase and decrease is such that they almost compensate for each other, resulting in very little variation of the average heat transfer coefficient with tube inclination. The increase in bubble sliding length at the bottom wall and decrease in bubble sliding length at the top wall are thought to be the reasons for this behaviour. Experiments have been conducted with water, ethanol and acetone at atmospheric pressure, to confirm similar effects of inclination irrespective of fluid property.
机译:进行了实验,以研究不同管径和表面粗糙度值时管子倾斜度对核池沸腾传热的影响。结果表明,当管子从垂直方向倾斜到水平方向时,顶部和底部的温度(相对于圆周)分别升高和降低。增大和减小使得它们几乎彼此补偿,从而导致平均热传递系数随管子倾斜度的变化很小。底壁上的气泡滑动长度的增加和顶壁上的气泡滑动长度的减小被认为是这种行为的原因。已经在大气压下对水,乙醇和丙酮进行了实验,以证实与流体性质无关的类似倾斜效果。

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