过载环境下水平管内水的流动沸腾特性

李根; 方贤德; 罗组分; 覃业棋

doi:10.13224/j.cnki.jasp.20210128

过载环境下水平管内水的流动沸腾特性

doi: 10.13224/j.cnki.jasp.20210128

南京航空航天大学航空学院飞行器环境控制与生命保障工业和信息化部重点实验室，南京 210016

基金项目: 国家自然科学基金（52076107，51576099）；江苏高校优势学科建设工程资助项目

详细信息

作者简介:
李根（1989-），男，博士生，主要从事飞行器环境控制和两相流传热传质研究。E-mail：ligenlglg@nuaa.edu.cn

中图分类号: V245.3;TK124
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- 文章访问数: 90
- HTML浏览量: 10
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- 被引次数: 0
出版历程
- 收稿日期: 2021-03-23
- 刊出日期: 2022-01-28

Flow boiling characteristics of water in a horizontal tube under hypergravity environment

Key Laboratory of Aircraft Environment Control and Life Support，Ministry of Industry and Information Technology，College of Aerospace Engineering，Nanjing University of Aeronautics and Astronautics，Nanjing 210016，China

摘要

摘要: 利用地面离心旋转台实验研究了不同过载环境下水在1.8 mm内径水平管内流动沸腾的摩擦压降特性。实验工况为过载加速度1.00 $g ~ 3.16 g$ ，质量流速为230、330 $k g / (m^{2} ? s)$ ，热流密度为102、141 kW/m²，干度为0.07~0.58。结果表明：不同过载环境、干度、热流密度和质量流速对水的摩擦压降均有影响。摩擦压降随着过载的增加而略微减小，随着干度的增加而明显增大。另外热流密度和质量流速的增大均会增加摩擦压降，并且受到质量流速的影响更为显著。评价了8个常重力流动沸腾摩擦压降预测模型对实验数据的适用性，其中最小的平均绝对误差和平均相对误差分别为7.8%和6.9%。由于流动沸腾流型受到过载的影响较大，因此利用Fluent软件模拟研究了常重力和过载环境下的流型图，模拟结果显示过载对流动沸腾气液分离影响明显。
- 过载 /
- 流动沸腾 /
- 微通道 /
- 摩擦压降 /
- 流型
Abstract: Test on flow boiling frictional pressure drop characteristics of water in a horizontal 1.8 mm inner diameter tube under different hypergravities were conducted by using a centrifugal acceleration machine on the ground.The test conditions were hypergravities of 1.00g-3.16g，mass fluxes of 230 and 330 $k g / (m^{2} ? s)$ ，heat fluxes of 102 and 141 kW/m²，and vapor qualities from 0.07 up to 0.58.The results showed that different hypergravities，vapor qualities，heat fluxes，and mass fluxes all had effect on the frictional pressure drops of water，and the frictional pressure drops decreased with increasing hypergravities slightly，and increased with increasing vapor qualities significantly.Moreover，the frictional pressure drops increased with increasing both mass flux and heat flux，and the effect of mass flux was more remarkable.The applicability to the test data of eight flow boiling frictional pressure drop correlations developed for normal gravity were evaluated，and the minimum mean absolute deviation and mean relative deviation were 7.8% and 6.9%，respectively，among the correlations.The flow patterns of normal gravity and hypergravity were simulated by using Fluent software because the flow patterns of flow boiling were affected by hypergravities significantly.The simulation results indicated that the effect of hypergravity on flow boiling gas-liquid separation was obvious.
- hypergravity /
- flow boiling /
- mini-channel /
- frictional pressure drop /
- flow pattern

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