Augmented Heat Transfer by Gas Impingementin Liquid Bath

杨宁生; 沈自求

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Augmented Heat Transfer by Gas Impingementin Liquid Bath

更新时间：2025-12-16

- Augmented Heat Transfer by Gas Impingementin Liquid Bath
- CIESC Journal Issue 5, (1990)
- 作者机构：
  
  大连理工大学化学工程研究所,大连理工大学化学工程研究所 ,,辽宁,大连,辽宁,大连
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：25 October 1990，
  
  Published：25 October 1990
- 稿件说明：
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杨宁生, 沈自求. Augmented Heat Transfer by Gas Impingementin Liquid Bath[J]. CIESC Journal, 1990, (5).
DOI：

杨宁生, 沈自求. Augmented Heat Transfer by Gas Impingementin Liquid Bath[J]. CIESC Journal, 1990, (5). DOI：

摘要

很久以来

人们就认识到在液相中注入气泡可以产生强烈扰动

大在强化了对流传热和沸腾传热.不久前

C.F.Ma和Bergles侧进一步发现用异种气体快速冲击浸没在R-ll3中的微小加热壁面

其传热不但大为强化;而且可出现壁面温度低于液体冷却介质温度的“负温差传热”的奇异现象.此外

沈自求等最近亦发现

在蒸发过程中引入少量载气

可在气液界面上产生快速质量传递

使沸腾传热得到明显强化.此类现象的深入探讨对强化电子元件、蒸发器、原子能反应堆的传热均具有重要意义.

Abstract

The heat transfer of a small heating device can be augmented by gas impingement in a liquid coolant bath. The mechanism of its heat transfer augmentation was studied. Theoretical analysis and experimental investigation showed that besides the increasing heat transfer by the agitation of liquid caused by gas jet impingement there existed a heat sink caused by liquid coolant vaporization at the impinging gas-liquid coolant interphase. Due to such a quick vaporisation

the temperature at the gas-liquid interphase dropped notably

increasing the effective heat transfer driving force and in turn the heat transfer. From such a point of view

a physical model of simultaneous heat and mass transfer was proposed to reveal the mechanism of this particular heat transfer phonomenon

and the convective heat transfer coefficient and mass transfer coefficient can be calculated.

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