通道深宽比对液体火箭发动机推力室再生冷却的影响

吴峰; 曾敏; 王秋旺; 孙纪国

通道深宽比对液体火箭发动机推力室再生冷却的影响

1.
西安交通大学动力工程多相流国家重点实验室, 陕西西安 710049
2.
北京航空动力研究所, 北京 100076

基金项目: 国家自然科学基金资助项目(50323001)

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出版历程
- 收稿日期: 2005-11-04
- 修回日期: 2006-02-26
- 刊出日期: 2007-01-28

Effect of aspect ratio on heat transfer and fluid flow in regenerativecool ing channel of liquid rocket engine thrust chamber

1.
State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China
2.
Beijing Aviation Power Institute, Beijing 100076, China

摘要

摘要: 应用湍流模型对液体推进剂火箭发动机再生冷却推力室通道的流动与传热进行了三维数值模拟, 冷却工质为氢气, 其密度、导热系数、动力粘度随着温度和压力而变化, 冷却剂比热容及金属固体物性随着温度而变化.计算采用标准k-ε两方程湍流模型及气-固耦合算法.保持再生冷却通道个数及冷却工质进口流量不变, 通过改变通道肋壁厚度来改变冷却通道深宽比, 研究不同深宽比对推力室壁面再生冷却效果的影响规律.计算结果表明:增加通道深宽比对推力室壁面能够起到强化传热的作用, 但同时也增加了冷却通道的进出口压差.这是由于冷却工质流速的增高, 从而提高了推力室传热系数.随着深宽比不断增加, 推力室再生冷却效果趋于饱和, 而冷却工质进出口压降则不断上升.
- 航空、航天推进系统 /
- 液体推进剂火箭发动机 /
- 再生冷却通道 /
- 通道深宽比
Abstract: The turbulent fluid flow and heat transfer in a regenerative-cooling channel of liquid propellant rocket engine were numerically investigated by solving three-dimensional elliptical Navier-Stokes equations.The coolant was hydrogen,whose thermal properties such as thermal conductivity,density,dynamical viscidity,etc varied with both temperature and pressure.The specific heat of hydrogen and thermal properties of solid metal varied with temperature.The standard k-ε turbulence model and gas-solid coupled technique were adopted.An optimized calculation scheme was applied so as to find the best design for rocket combustion chamber.In the scheme,the cooling channel aspect ratio varied with the thickness of channel ribs while the channel number is fixed and coolant mass flow rate remains constant.The simulation results show that the heat transfer of rocket chamber will be enhanced when increasing the aspect ratio,but the pressure drop will increase simultaneously.The cooling effect of rocket thrust chamber will to be reach saturated as the aspect ratio becomes large enough.
- aerospace propulsion system /
- liquid propellant rocket engine /
- regenerative cooling channel /
- channel aspect ratio

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参考文献(12)

[1]	冯文澜,张远君.液体火箭发动机原理[M].北京:北京航空航天大学出版社,1991.
[2]	Vazquez M S,Rodriguez W V,Issa R.Effects of ridged WALLS on the heat transfer in a heated square duct[R].AIAA 91-2183,1991.
[3]	Bucchi,Andrea,Bruno,Claudio.Congiunti cooling performance in lox/methane liquid-fuel rocket engines bucchi,andrea[J].Journal of Spacecraft and Rockets,2005,42(3):476-486.
[4]	WANG TenSee,Luong V.Numerical a study on the cooling mechanism in liquid rocket engine[R].40th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit;Fort Lauderdale,FL;July 11-14,2004.
[5]	WANG TenSee,Luong V.Hot-gas-side and coolant-side heat transfer in liquid rocket engine combustors[J].Journal of Thermophysics and Heat Transfer,1994,8(3):524-530.
[6]	李军伟,刘宇.一种计算再生冷却推力室温度场的方法[J].航空动力学报,2004,19(4):550-556.LI Junwei,LIU Yu.Method of computing temperature field in regeneratively-cooled thrust chamber[J].journal of aerospace power.2004,19(4):550-556.
[7]	陈建华,杨宝庆,周立新,等.人为粗糙度强化换热机理分析及效果评估[J].火箭推进,2004,30(4):1-5.CHEN Jianhua,YANG Baoqing,ZHOU Lixin,et al.The mechanism and effect of artificial roughness on heat transfer enhancement[J].Journal of Rocket Propulsion.2004,30(4):1-5.
[8]	WU F,WANG Q W,LUO L Q.Numerical simulation on heat transfer and fluid flow in cooling channel of liquid rocket engine thrust chamber[A].Kobe:The 16th Computational Mechanics Conference JSME[C].2003,No.03-26:177-178.
[9]	吴峰,王秋旺,罗来勤,等.液体推进剂火箭发动机推力室再生冷却通道三维流动与传热数值计算[J].航空动力学报,2005,20(4):707-712.WU Feng,WANG Qiuwang,LUO Laiqin,et al.Numerical simulation of heat transfer and fluid flow in cooling channel of the liquid rocket engine thrust chamber[J].Journal of Aerospace Power.2005,20(4):707-712.
[10]	吴峰,王秋旺,罗来勤,等.液体火箭发动机推力室冷却通道流动与传热数值研究[J].推进技术,2005,26(5):389-393.WU Feng,WANG Qiuwang,LUO Laiqin,et al.Numerical investigation of turbulent models on heat transfer and fluid flow in cooling channel of H2/O2 liquid rocket engine thrust chamber[J].Journal of Propulsion Technology,2005,26(5):389-393.
[11]	杨世铭,陶文铨.传热学(第三版)[M].北京:高等教育出版社,2000.
[12]	陶文铨.数值传热学(第二版)[M].西安:西安交通大学出版社,2001.