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首页> 外文期刊>Journal of enhanced heat transfer >NUCLEATE BOILING HEAT TRANSFER PERFORMANCE OF LASER TEXTURED COPPER SURFACES
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NUCLEATE BOILING HEAT TRANSFER PERFORMANCE OF LASER TEXTURED COPPER SURFACES

机译：激光纹理铜表面的核沸腾传热性能

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摘要

This paper reports the effect of channels/grooves developed on a copper surface by using a laser marking process on nucleate boiling heat transfer. Tests were conducted at atmospheric pressure and saturated pool boiling condition by using water as a pool liquid with varying heat flux values. Six different test sections are developed by varying laser power between 40-50 watts. The maximum enhancement in the heat transfer for laser processed surfaces was found to be 219% compared to plain surfaces. The present experimental investigation reveals that the laser marking process develops channels/grooves on the test surface with cavities inside them. The cavities inside channels/grooves act as active nucleation sites and channels/grooves provide a liquid path to the nucleation site, delaying a dry-out condition.
机译：本文报道了使用激光打标工艺在铜表面形成的通道/沟槽对成核沸腾传热的影响。通过使用水作为具有不同热通量值的水池液体，在大气压和饱和水池沸腾条件下进行测试。通过在40至50瓦之间改变激光功率，开发出六个不同的测试部分。与平整表面相比，发现激光加工表面的热传递最大增强为219％。当前的实验研究表明，激光打标过程会在测试表面上形成带有沟槽的沟槽/凹槽。通道/凹槽内的腔体充当主动形核点，通道/凹槽为通向形核点的液体提供了路径，从而延缓了干燥状态。

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