Experimental Study of Flow Boiling Heat Transfer Performance in High Aspect Ratio Microchannels

Zhu Xueyue; Huang Tao; Li Meiyong; Liu Zeyu; Shen Limei; Liu Zhichun

doi:10.12465/issn.0253-4339.20251117001

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Experimental Study of Flow Boiling Heat Transfer Performance in High Aspect Ratio Microchannels

更新时间：2026-04-24

- Experimental Study of Flow Boiling Heat Transfer Performance in High Aspect Ratio Microchannels
- Journal of Refrigeration Pages: 1-7(2026)
- 作者机构：
  
  华中科技大学能源与动力工程学院武汉 430074
- 作者简介：
- 基金信息：
  
  the National Natural Science Foundation of China(52176007)
- DOI：10.12465/issn.0253-4339.20251117001
  CLC： TB657.5;TK124;O359⁺.1
- Received：17 November 2025，
  
  Revised：2026-01-04，
  
  Accepted：13 January 2026，
  
  Online First：24 April 2026，
- 稿件说明：
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朱学跃,黄涛,李美勇等.大高宽比微通道流动沸腾传热特性实验研究[J].制冷学报,

Zhu Xueyue Huang Tao Li Meiyong Liu Zeyu Shen Limei Liu Zhichun.Experimental Study of Flow Boiling Heat Transfer Performance in High Aspect Ratio Microchannels[J].Journal of Refrigeration,
朱学跃,黄涛,李美勇等.大高宽比微通道流动沸腾传热特性实验研究[J].制冷学报, DOI：10.12465/issn.0253-4339.20251117001.

Zhu Xueyue Huang Tao Li Meiyong Liu Zeyu Shen Limei Liu Zhichun.Experimental Study of Flow Boiling Heat Transfer Performance in High Aspect Ratio Microchannels[J].Journal of Refrigeration, DOI：10.12465/issn.0253-4339.20251117001.

摘要

为研究大高宽比微通道流动沸腾传热特性，本文以高宽比为18、基材为紫铜的微通道散热器为实验对象，搭建性能测试实验平台，实验研究了持续和间歇2种热源加热模式下微通道散热器温度流动响应与散热特性。结果表明：在持续加热300 W/cm

与间歇加热750 W/cm

-加热时间90 s条件下，该微通道散热器表现出良好的两相传热性能，热源面稳定温度能够控制在75 ℃水平内，进出口压降维持在约18 kPa。流量与微通道进出口压降之间存在较强的正相关关系。

Abstract

In this study， we analyzed the flow-boiling heat transfer behavior of a copper microchannel heat sink with a high geometric aspect ratio of 18. An experimental platform was established to systematically evaluate the thermohydraulic response and heat dissipation capability under two heating regimes： continuous and intermittent. In the continuous mode with a heat flux of 300 W/cm² and in the intermittent mode with 750 W/cm² for 90 s， the heat sink successfully maintained the heat-source surface temperature below 75 ℃， while the inlet-outlet pressure drop remained around 18 kPa， indicating excellent two-phase thermal and hydraulic performance. In addition， the flow rate and microchannel pressure drop exhibited a strong positive correlation.

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references

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