Abstract

The paper presents results of experimental research on the influence of the mass flux on the heat transfer during flow boiling of subcooled de-ionized water in conditions of three-side heating in a system of two microchannels with an aspect ratio of 13.3. The horizontal experimental section was a copper block with two microchannels 2 mm wide, 0.15 mm deep, and 16 mm long; the inner surface of the microchannels was covered with a thin layer of nickel with hydrophilic nanoparticles of Aerosil 200. The mass flux varied from 500 to 3500 kg/m extsuperscript2s; the initial water subcooling relative to the saturation temperature at the microchannel outlet was 80°C. The dependence of the superheat of the wall on the heat flux density was determined; the critical heat fluxes were measured; comparison of the obtained data with calculation based on the binomial equation for subcooled boiling in a microchannel was carried out.

中文翻译：

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高纵横比短微通道中水流动沸腾传热过程

摘要

本文介绍了质量通量对三边加热条件下过冷去离子水流动沸腾过程中传热影响的实验研究结果，该系统由两个纵横比为 13.3 的微通道组成。水平实验段为铜块，带有两条宽2mm、深0.15mm、长16mm的微通道；微通道的内表面覆盖有一层薄薄的镍和 Aerosil 200 的亲水纳米颗粒。质量通量从 500 到 3500 kg/m ext上标2s 不等；微通道出口处相对于饱和温度的初始水过冷度为 80°C。确定了壁面过热度对热通量密度的依赖性；测量了临界热通量；