Influence of metal foams on two-phase pressure drop of R410A flow boiling in circular tubes

SUN Shuo; HU Haitao; DING Guoliang; ZHU Yu

doi:10.3969/j.issn.0438-1157.2012.11.007

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Influence of metal foams on two-phase pressure drop of R410A flow boiling in circular tubes

更新时间：2025-12-10

- Influence of metal foams on two-phase pressure drop of R410A flow boiling in circular tubes
- CIESC Journal Issue 11, Pages: 3428-3433(2012)
- 作者机构：
  
  上海交通大学制冷与低温工程研究所,上海,200240
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2012.11.007
  CLC： K124
- Online First：05 November 2012，
  
  Published：05 November 2012
- 稿件说明：
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SUN Shuo, HU Haitao, DING Guoliang, et al. Influence of metal foams on two-phase pressure drop of R410A flow boiling in circular tubes[J]. CIESC Journal, 2012, (11): 3428-3433.
DOI：

SUN Shuo, HU Haitao, DING Guoliang, et al. Influence of metal foams on two-phase pressure drop of R410A flow boiling in circular tubes[J]. CIESC Journal, 2012, (11): 3428-3433. DOI： 10.3969/j.issn.0438-1157.2012.11.007.

摘要

对填充泡沫金属的圆管中R410A流动沸腾的两相流压降特性进行了实验研究。实验对象为两根内径13.8 mm

分别填充5 PPI/95%孔隙率和10 PPI/95%孔隙率的泡沫铜的圆管。实验工况涵盖:蒸发压力995 kPa;质流密度30~90 kg·m-2·s-1;热通量5.9~16.5 kW·m-2;入口干度0.175~0.775。实验结果表明:泡沫金属显著增加制冷剂流动沸腾的压降

在入口干度为0.775

质流密度为90 kg·m-2·s-1时

内嵌10 PPI 泡沫金属的圆管中的压降梯度达56 kPa·m-1;泡沫金属PPI越大

压降增加越多

相同工况下内嵌10 PPI泡沫金属圆管中制冷剂流动沸腾的压降是内嵌5 PPI泡沫金属圆管中的压降的1.2倍左右。根据实验数据开发了适用于填充泡沫金属的内径13.8 mm圆管中的流动沸腾的压降关联式

结果表明90%的预测值与实验值的偏差在±15%以内。

Abstract

The two-phase pressure drop characteristics of R410A flow boiling inside tubes filled with metal foams were investigated experimentally.The test sections are two tubes of 13.8 mm inner diameter filled with 5 PPI/95% porosity and 10 PPI/95% porosity metal foams separately.Experimental conditions include saturation pressure of 995 kPa

mass flux from 30 to 90 kg穖-2穝-1

heat flux from 5.9 to 16.5 kW穖-2

and inlet vapor quality from 0.175 to 0.775.The experimental results are as follows.Metal foams always increase the pressure drop of flow boiling

and the pressure drop reaches 56 kPa穖-1 at vapor quality of 0.775 and mass flux of 90 kg穖-2穝-1. The pressure drop increases with the value of PPI

and the pressure drop with 10 PPI metal foams can be as much as 1.2 times that with 5 PPI metal foams under the same working condition.A pressure drop correlation for the 13.8 mm tube filled with metal foams was developed based on the experimental data

and 90% of the predicted results agree with the experimental data within a deviation of ?15%.

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