气氮调温器Y型喷嘴实验及数值研究

王泽; 邢玉明; 刘鑫; 赵亮

doi:10.13224/j.cnki.jasp.2016.12.011

气氮调温器Y型喷嘴实验及数值研究

doi: 10.13224/j.cnki.jasp.2016.12.011

北京航空航天大学航空科学与工程学院, 北京 100191

详细信息

作者简介:
王泽(1988-),男,天津人,博士生,主要从事喷嘴雾化研究.

中图分类号: V416.5
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- 文章访问数: 1035
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- 被引次数: 0
出版历程
- 收稿日期: 2016-04-15
- 刊出日期: 2016-12-28

Experimental and numerical study of Y-jet nozzle of LN₂-spray temperature-adjusting system

School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

摘要

摘要: 基于FLUENT软件离散相模型及气体助力雾化模型，采用欧拉-拉格朗日方法研究通过Y型喷嘴雾化液氮的雾化特性.由于液氮液滴的蒸发相变，与水相比喷雾锥角更清晰且明显减小，约为10°，喷雾距离缩短.分析喷嘴气液工作压力对液氮雾化索太尔平均直径（SMD）、液滴体积分数和数量分数的影响.结果表明：SMD沿喷射方向变化幅度极小；SMD主要受气相速度及气液比影响，气压低时气相速度影响较大，气压高时气液比影响较大；由于相变作用，液氮雾化粒径分布更为集中.数值研究Y型喷嘴用于不同流量需求的气氮调温器的调温效果，出口温度低于98K，进出口温差达到12K，且整个出口温差在±1K以内，能够实现精确控温要求.
- Y型喷嘴 /
- 雾化 /
- 液氮 /
- 低温环境模拟 /
- 气氮调温器
Abstract: Based on Euler-Lagrange method, the characteristic of LN₂ (liquid nitrogen) atomized by the Y-jet nozzle was studied by discrete phase model and air blast atomizer model of software FLUENT. Because of the evaporation effect of LN₂ droplets, the spray angle was about 10°, significant smaller than the spray angle of water, and the spray distance was shortened. The effect of operating pressure on the Sauter mean diameter (SMD) and the distribution of volume fraction and quantity percentage was analyzed. The results indicate that the SMD along the spray direction is essentially unchanged. The SMD is controlled by gas velocity and gas-liquid ratio, and gas velocity is the major factor in the low pressure conditions while gas-liquid ratio is the major factor in the high pressure conditions. The distribution of LN₂ droplets diameter is more concentrated than in the cases using water, due to the evaporation of droplets. The effect of temperature control of LN₂-spray temperature-adjusting system using Y-jet nozzles with different flow rate demands was also investigated. The temperature of outlet was lower than 98K with temperature difference of 12K between inlet and outlet, and the temperature difference of outlet was within ±1K, which could satisfy the temperature control requirements.
- Y-jet nozzle /
- atomization /
- liquid nitrogen /
- low temperature environment simulation /
- LN₂-spray temperature-adjusting system

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参考文献(18)

[1]	张磊,刘敏,王紫娟,等.国外调温热沉研究现状及技术发展[J].航天器环境工程,2012,29(2):179-184. ZHANG Lei,LIU Min,WANG Zijuan,et al.A review of technologies of temperature-adjustable heat sink[J].Spacecraft Environment Engineering,2012,29(2):179-184.(in Chinese)
[2]	柯守全.卫星环境工程和模拟试验:上[M].北京:中国宇航出版社,2009.
[3]	曾青华,孔文俊,艾育华,等.贫油直喷三喷嘴模型燃烧室燃烧性能[J].航空动力学报,2014,29(6):1295-1300. ZENG Qinghua,KONG Wenjun,AI Yuhua,et al.Combustion performances of lean direct injection model combustor with three injectors[J].Journal of Aerospace Power,2014,29(6):1295-1300.(in Chinese)
[4]	张荣春,樊未军,宋双文.驻涡燃烧室蒸发管供油装置的雾化蒸发性能试验[J].航空动力学报,2011,26(11):2495-2502. ZHANG Rongchun,FAN Weijun,SONG Shuangwen.Atomization and evaporation performance experiment of evaporating tube for trapped vortex combustor[J].Journal of Aerospace Power,2011,26(11):2495-2502.(in Chinese)
[5]	王辽,章成亮,韦宝禧,等.应用气泡雾化喷嘴的煤油超声速燃烧试验[J].航空动力学报,2009,24(2):353-359. WANG Liao,ZHANG Chengliang,WEI Baoxi,et al.Experimental investigation of kerosene supersonic combustion test using aerated-liquid injectors[J].Journal of Aerospace Power,2009,24(2):353-359.(in Chinese)
[6]	霍伟业,林宇震,张弛,等.正癸烷作为航空煤油雾化过程代理燃料的研究[J].航空动力学报,2016,31(1):188-195. HUO Weiye,LIN Yuzhen,ZHANG Chi,et al.Research on n-decane as surrogate fuel of aviation kerosene in atomization process[J].Journal of Aerospace Power,2016,31(1):188-195.(in Chinese)
[7]	周兵,吉洪湖,张宝诚.旋流空气对双油路离心喷嘴雾化特性影响的实验[J].航空动力学报,2013,28(9):1933-1941. ZHOU Bing,JI Honghu,ZHANG Baocheng.Experiment of swirled air effect on spray characteristic of double-line pressure-swirl atomizer[J].Journal of Aerospace Power,2013,28(9):1933-1941.(in Chinese)
[8]	徐振立,陶乐仁,郑志皋.西兰花液氮流态化速冻的实验研究及理论分析[J].工程热物理学报,2007,28(增刊2):49-51. XU Zhenli,TAO Leren,ZHENG Zhigao.Experiment research and theoretical analysis about L-N₂ spraying fluidized quick freezing of broccoli[J].Journal of Engineering Thermophysics,2007,28(Suppl.2):49-51.(in Chinese)
[9]	郭旭峰,陶乐仁.液氮喷淋流态化速冻系统及冷冻性能研究[J].工程热物理学报,2003,24(3):475-477. GUO Xufeng,TAO Leren.Investigation on freezing characteristic of LN₂-spraying fluidized cooling system[J].Journal of Engineering Thermophysics,2003,24(3):475-477.(in Chinese)
[10]	苏宇.新型低温MQL装置的研制与难加工材料低温高速切削机理研究[D].南京:南京航空航天大学,2007. SU Yu.Development of new cryogenic MQL equipment and research on the cryogenic high speed cutting of difficult-to-machine materials[D].Nanjing:Nanjing University of Aeronautics and Astronautics,2007.(in Chinese)
[11]	于旸.船舶尾管轴承冷套技术研究[D].上海:上海交通大学,2006. YU Yang.Technology research of stern tube bearing cold-installation[D].Shanghai:Shanghai Jiao Tong University,2006.(in Chinese)
[12]	Sonnex T S,Dawber R P R.Rhinophyma-treatment by liquid nitrogen spray cryosurgery[J].Clinical and Experimental Dermatology,1986,11(3):284-288.
[13]	Greenwald B D,Dumot J A,Horwhat J D.Safety,tolerability,and efficacy of endoscopic low-pressure liquid nitrogen spray cryotherapy in the esophagus[J].Diseases of the Esophagus,2010,23(1):13-19.
[14]	Watson R N,Proulx G F.A new thermal vacuum facility for Hughes space and communications at El Segundo California[C]//Proceedings of 20th Space Simulation Conference the Changing Testing Paradigm.[S.l.]:NASA,1998:113-130.
[15]	Govindan P,Satyanarayana M,Deviprasad K,et al.Design and performance of φ0.6m thermal vacuum chamber[C]//Proceedings of the 18th International Cryogenic Engineering Conference.New Delhi:Narosa Publishing House,2000:679-682.
[16]	ZHOU Yuegui,ZHANG Mingchuan,YU Juan,et al.Experimental investigation and model improvement on the atomization performance of single-hole Y-jet nozzle with high liquid flow rate[J].Powder Technology,2010,199(3):248-255.
[17]	曹建明.喷雾学[M].北京:机械工业出版社,2005.
[18]	Mullinger P J,Chigier N A.The design and performance of internal mixing multijet twin fluid atomizers[J].Journal of the Institute of Fuel,1974,47(11):251-261.