超临界压力航空煤油RP-3在竖直微细管内的对流换热实验

赵伟; 闻洁; 付衍琛; 张楠; 黄浩然

doi:10.13224/j.cnki.jasp.2018.03.014

超临界压力航空煤油RP-3在竖直微细管内的对流换热实验

doi: 10.13224/j.cnki.jasp.2018.03.014

北京航空航天大学能源与动力工程学院航空发动机气动热力国家级重点实验室，北京 100191

基金项目: 国家自然科学基金（51606179）

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出版历程
- 收稿日期: 2016-08-05
- 刊出日期: 2018-03-28

Experiment on convective heat transfer of aviation keroseneRP-3 in vertical micro-tube at supercritical pressure

摘要

摘要: 以实验方式对超临界压力RP-3在内径为1.09mm微细管内的对流换热进行了研究，剖析了系统压力、加热热流密度、流动方向及浮升力这些因素对对流换热的影响。实验中热流密度控制为180~460kW/m2，系统进口压力变化范围为3~5MPa，进口雷诺数在3200~10200范围内变化。结果表明：对于向下流动，在实验段入口处浮升力对换热产生了恶化作用，热流密度越大，恶化作用越强；系统压力主要是通过影响流体热物性对对流换热产生影响；不同流动方向对对流换热的影响十分显著，整体上向下流动换热得到强化，向上流动换热得到恶化。
- 超临界 /
- 航空煤油 /
- 微细管 /
- 对流换热 /
- 浮升力
Abstract: Convective heat transfer of supercritical China aviation fuel RP-3 in vertical micro-tube (inner diameter of 1.09mm) was experimentally investigated. Influences of system pressure, heat flux, flow direction and buoyancy on heat transfer were analyzed. Wall heat fluxes (180-460kW/m2), system import pressure (3-5MPa) and inlet Reynolds number (3200-10200) were maintained in experiments. The result showed that the buoyancy force deteriorated the heat transfer of downward flow in the entrance of test section; system pressure affected the convective heat transfer mainly by the impact of fluid thermal properties; effects of different flow directions on convection heat transfer were very significant. Overall heat transfer was strengthened for downward flow and decreased for upward flow.
- supercritical /
- aviation kerosene /
- micro-tube /
- convective heat transfer /
- buoyancy

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参考文献(19)

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