超临界压力正癸烷在竖直圆管内的流动阻力实验

包旭东; 徐国强; 闻洁; 付衍琛

doi:10.13224/j.cnki.jasp.2018.03.015

超临界压力正癸烷在竖直圆管内的流动阻力实验

doi: 10.13224/j.cnki.jasp.2018.03.015

1.
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
2.
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（50676005）

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

Experiment on flow resistance of n-decane invertical tube at supercritical pressure

摘要

摘要: 研究了加热条件下超临界压力下正癸烷在竖直细圆管内的流动阻力特性，分析了热流密度、系统压力以及进口温度对摩擦压降的影响规律。实验结果表明：当流体温度较低时，流体摩擦压降随着热流密度的升高而逐渐降低；当流体温度逐渐接近拟临界温度时，由于物性的剧烈变化，流体摩擦阻力压降随着热流密度的升高而增加。并且系统压力越低，拟临界点附近的变化就越剧烈。当流体温度高于拟临界温度时，物性变化趋于平稳，流体摩擦压降随热流密度升高而增加。基于实验结果，总结出了一种针对不同温度、不同热流密度与质量流速比值范围的摩擦阻力系数经验关系式。
- 超临界压力 /
- 正癸烷 /
- 流动阻力 /
- 热物性 /
- 摩擦压降
Abstract: The flow resistance characteristics under heating condition of n-decane in the vertical miniature tube at supercritical pressure were investigated. The influence of heat flux, system pressure and inlet temperature was mainly studied. The result indicated that, the pressure drop due to frictional resistance in tube decreased with the rise of heat flux when fluid temperature was not very high. When temperature rose to the pseudocritical point, due to the effect of thermal physical properties, the pressure drop increased. And the lower system pressure led to more violent pressure drop changes. While the temperature of fluid was higher than the pseudo-critical temperature, pressure drop went up with increases of heat flux because of steady thermal physical properties. As a result, an empirical correlation of frictional resistance was derived for different temperatures and ratios of heat flux to mass velocity.
- supercritical pressure /
- n-decane /
- flow resistance /
- thermal physical property /
- pressure drop

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参考文献(16)

[1]	BRUENING G B,CAHNG W S.Cooled cooling air systems for turbine thermal management［R］.ASME Paper 99-GT-014,1999.
[2]	PIORO I L,DUFFEY R B,DUMOUCHEL T J.Hydraulic resistance of fluids flowing in channels at supercritical pressures (survey)［J］.Nuclear Engineering and Design,2004,231(2):187-197.
[3]	FANG X,XU Y,SU X,et al.Pressure drop and friction factor correlations of supercritical flow［J］.Nuclear Engineering and Design,2012,242(2):323-330.
[4]	TARSOVA N V,LEONTV A I.Hydraulic resistance during flow of water in heated pipes at supercritical pressures ［J］.High Temperature,1968,6(4):721-730.
[5]	RAZUMOVSKIY V G,ORNATSKII A P,MAEVSKII E M.Hydraulic resistance and heat transfer of smooth channels with turbulent flow of water of supercritical pressure ［J］.Thermal Engineering,1984,31(2):109-113.
[6]	KURGANOV V A,ZEIGARNIK Y A,MASLAKOVA I V.Heat transfer and hydraulic resistance of supercritical-pressure coolants:Part Ⅰ specifics of thermophysical properties of supercritical pressure fluids and turbulent heat transfer under heating conditions in round tubes［J］.International Journal of Heat and Mass Transfer,2012,55(11/12):3061-3075.
[7]	KURGANOV V A,ZEIGRNIK Y A,MASLAKOVA I V.Heat transfer and hydraulic resistance of supercritical-pressure coolants:Part Ⅱ experimental data on hydraulic resistance and averaged turbulent flow structure of supercritical pressure fluids during heating in round tubes under normal and deteriorated heat transfer conditions［J］.International Journal of Heat and Mass Transfer,2013,58(1/2):152-167.
[8]	KURGANOV V A,KAPTILNY A G.Velocity and enthalpy fields and eddy diffusivities in a heated supercritical fluid flow［J］.Experimental Thermal and Fluid Science,1992,5(4):465-478.
[9]	KURGANOV V A,KAPTILNI A,ANKUDINOV V B.Total flow resistance and fluid friction associated with ascending and descending supercritical fluid-flow in heated pipes［J］.Teplofizika Vysokikh Temperature,1989,27(1):94-103.
[10]	HUAI X L,KOYAMA S,ZHAO T S.An experimental study of flow and heat transfer of supercritical carbon dioxide in multi-port mini channels under cooling conditions［J］.Chemical Engineering Science,2005,60(12):3337-3345.
[11]	淮秀兰.微通道内超临界二氧化碳的压降与传热特性［J］.工程热物理学报,2004,25(5):843-845.HUAI Xiulan.Heat transfer and pressure drop of supercritical carbon dioxide in multi-port channels［J］.Journal of Engineering Thermophysics,2004,25(5):843-845.(in Chinese)
[12]	PETTERSON J,RIEBERER R,MUNKEJORD S T.Heat transfer and pressure drop for flow of supercritical and subcritical CO2 in microchannel tubes ［R］.London,England：Norwegian University of Science and Technology,2000.
[13]	YAMASHITA T,MORI H,YOSHIDA S,et al.Heat transfer and pressure drop of a supercritical pressure fluid flowing in a tube of small diameter ［J］.Memoirs of the Faculty of Engineering Kyushu University,2003,63(4):227-244.
[14]	MITRA B,GARIMELLA S.Supercritical heat transfer and pressure drop in refrigerant R410A［R］.ASME Paper GT2003-47273,2003.
[15]	FILONENKO G K.Hydraulic resistance in pipes ［J］.Teploenergetika,1954,1(4):40-44.
[16]	ORNATSKIY A P,DASHKIEV Y G,PERKOV V G.Steam generators of supercritical pressures［M］.Kiev,Ukraine:Vyscha Shkola Publishing House,1980.(in Russian)