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首页> 外文期刊>International Journal of Heat and Mass Transfer >Boiling heat transfer on large diamond and SiC heaters: The influence of thermal wall properties
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Boiling heat transfer on large diamond and SiC heaters: The influence of thermal wall properties

机译：大型金刚石和SiC加热器上的沸腾传热：热壁性能的影响

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Pool boiling experiments were performed on large synthetic diamond and SiC substrates with integrated heating and temperature sensor elements. The boiling fluid was pure water at atmospheric pressure. The two heating substrates were identical with regard to geometry and design, and were mainly comparable in terms of surface roughness and static contact angle. This enabled the influence of the thermal heating wall properties on the resulting heat transfer to be investigated directly. The extraordinarily high value of the thermal conductivity of the synthetic diamond heater led systematically to higher mean heat transfer rates within the nucleate boiling regime compared to the SiC material. Strong thermal fluctuations due to the growth and detachment of vapor bubbles were recorded for both heaters. Indications for the existence of a local heat flux reversal from the liquid to the wall have been found by means of re-condensation phenomena and direct temperature measurements during boiling.
机译：在带有集成加热和温度传感器元件的大型人造金刚石和SiC基底上进行了池沸腾实验。沸腾的流体是大气压下的纯水。两种加热基板的几何形状和设计均​​相同，并且主要在表面粗糙度和静态接触角方面具有可比性。这使得能够直接研究热加热壁特性对所得传热的影响。与SiC材料相比，合成金刚石加热器的导热系数极高，导致在晶核沸腾范围内的平均传热速率更高。记录到两个加热器由于蒸气气泡的增长和脱离而产生的强烈的热波动。通过再冷凝现象和沸腾过程中的直接温度测量，已经发现存在从液体到壁的局部热通量反转的迹象。

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