超临界压力下航空煤油在并联管中流量分配特性

冉振华; 徐国强; 邓宏武; 张春本; 朱锟; 黄文

超临界压力下航空煤油在并联管中流量分配特性

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)

计量
- 文章访问数: 1916
- HTML浏览量: 226
- PDF量: 571
- 被引次数: 0
出版历程
- 收稿日期: 2011-03-21
- 修回日期: 2011-07-20
- 刊出日期: 2012-01-28

Characteristics of flow distribution of aviation kerosene in parallel pipes under supercritical pressure

National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics, School of Jet Propulsion, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

摘要

摘要: 研究了超临界压力下国产航空煤油RP-3在竖直并联U型管中的流量分配特性,分析了工质温度、系统压力以及加热热流密度不对称性对流量分配特性的影响规律.其中实验段内、外径分别为1.8mm和2.2mm, 实验中质量流量保持为4g/s,系统压力变化范围为3~5MPa,热流密度变化范围为q=60~240kW/m². 实验结果表明:较低系统压力下,等热流密度加热至管路油温达到拟临界温度附近时会诱发支管流量的较大变化,从而导致并联管系统各支路流量的重新分配;加热不均对支路流量的影响非常显著;另外,提高系统压力可以有效抑制并联管系统中各支路流量分配失衡,增强系统的稳定性.
- 超临界 /
- RP-3 /
- 并联管 /
- 流量分配 /
- 稳定性
Abstract: Flow distribution characteristics of China No.3 kerosene (RP-3) in vertical parallel U-turn tubes were experimentally investigated under supercritical pressures.Based on the experimental results,the effects of temperature,pressure and asymmetrical heat flux to the flow distribution characteristics of the RP-3 were analyzed.In the experiments,the inner and outer diameters of the test tube are 1.8mm and 2.2mm respectively;the mass flow rate is maintained at 4g/s under the pressure from 3 to 5MPa,and the heat flux changes from 60 to 240kW/m².The test results indicate that static unsteady phenomenon will be induced when fuel temperature is close to its pseudo-critical point under the lower pressure,which leads to flow imbalance and flow redistribution between the two tubes.In addition,the mass flow in the branch tube is significantly affected by the non-uniformity of heat flux,and the system stability can be improved effectively by the increase of pressure and which will inhibit the flow distribution differences in the parallel pipes.
- supercritical /
- RP-3 /
- parallel pipes /
- flow distribution /
- stability

HTML

参考文献(13)

[1]	Bruening G B,Chang W S.Cooled cooling air systems for turbine thermal management.ASME Paper 99-GT-14,1999.
[2]	Jackson K,Corporan E,Buckley P,et al.Test results of an endothermic fuel reactor.AIAA 95-6028,1995.
[3]	Lander H R,Nixon A C.Endothermic fuels for high Mach vehicles[J].American Chemical Society,Division of Petroleum,1987,32(2) :504-511.
[4]	孙青梅,米镇涛,张香文.吸热型碳氢燃料RP-3仿JP-7临界性质(t_c,p_c)的测定[J].燃料化学学报,2006,34(4):466-470. SUN Qingmei,MI Zhentao,ZHANG Xiangwen.Determination of critical properties(t_c,p_c) of endothermic hydrocarbon fuels RP-3 and simulated JP-7[J].Journal of Fuel Chemistry and Technology,2006,34(4):466-470.(in Chinese)
[5]	Boure J A,Bergles A E,Tong L S.Review of two-phase flow instability[J].Nuclear Engineering and Design,1973,25(2):165-192.
[6]	Shen P I.The effect of friction on flow distribution in dividing and combining flow manifolds[J].ASME Journal of Fluids Engineering,1992,114(1):121-123.
[7]	陈听宽,荆建刚,罗毓珊.并联管两相流不稳定性的研究[J].工程热物理学报,2002,23(1):99-102. CHEN Tingkuan,JING Jiangang,LUO Yushan.An investigation on the two-phase flow instability in parallel pipes[J].Journal of Engineering Thermophysics,2002,23(1):99-102.(in Chinese)
[8]	韦晓丽,缪正清.Z型和U型集箱并联管组流动特性的实验研究[J].动力工程,2008,28(4):514-518. WEI Xiaoli,MIAO Zhengqing.Experimental study of flow characteristics in parallel tube set systems with type-Z and type-U headers[J].Journal of Power Engineering,2008,28(4):514-518.(in Chinese)
[9]	朱玉琴,毕勤成,陈听宽.超临界压力下水冷壁中间集箱分配特性的研究[J].热能动力工程,2006,21(3):299-302. ZHU Yuqin,BI Qincheng,CHEN Tingkuan.An investigation on the flow distribution characteristics of a water-wall intermediate header at a supercritical pressure[J].Journal of Engineering for Thermal Energy and Power,2006,21(3):299-302.(in Chinese)
[10]	张春本,邓宏武,徐国强,等.超临界压力下航空煤油RP-3焓值的测量及换热研究[J].航空动力学报,2010,25(2):331-335. ZHANG Chunben,DENG Hongwu,XU Guoqiang.Enthalpy measurement and heat transfer investigation of RP-3 kerosene at supercritical pressure[J].Journal of Aerospace Power,2010,25(2):331-335.( in Chinese)
[11]	Deng H W,Zhang C B,Xü G Q,et al.Density measurements of endothermic hydrocarbon fuel at sub- and supercritical conditions[J].Journal of Chemical & Engineering Data,2011,56(6):2980-2986.
[12]	ZHONG Fengquan,FAN Xuejun,YU Gong,et al.Heat transfer of aviation kerosene at supercritical conditions [J].Journal of Thermophysics and Heat Transfer,2009,23(3):543-550.
[13]	黄文,邓宏武,徐国强,等.U型管内超临界压力航空煤油压降特性[J].航空动力学报,2011,26(3):582- 587. HUANG Wen,DENG Hongwu,XU Guoqiang,et al.Pressure drop characteristics of supercritical aviation kerosene in U-turn tube[J].Journal of Aerospace Power,2011,26(3):582-587.(in Chinese)