Theory and experiment on air flow field in bearing chamber
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摘要: 采用有限元数值分析和试验研究的方法,研究了航空发动机轴承腔气相介质的压力场和速度场,探讨了转子转速和密封进气量等工况参数对轴承腔气相介质压力和速度分布的影响规律,研究工作表明:轴承腔气相介质压力随着转子转速、无量纲径向坐标、密封进气量的增加而增高;气相介质无量纲切向速度随着转子转速增高而增大,随着密封进气量增大而减小.试验结果表明:随着转子转速和密封进气量的增加,气相介质压力的试验结果与计算结果吻合性均增高.通过计算和试验揭示出的工况参数对轴承腔气相介质压力的影响规律,有助于轴承腔气相介质流动物理特性研究的完整性.Abstract: Investigations into the pressure and velocity fields for the air in an aero-engine bearing chamber were conducted using the finite element numerical method and experimental study. The influence of the operating parameters, such as the rotor speeds and the sealing air mass flow rates, on the pressure and velocity distributions of air in bearing chamber was discussed. The research results show preliminarily that the air pressure in bearing chamber mounts up with the increasing rotor speeds, nondimensional radial coordinate and sealing air mass flow rates. In contrast, the nondimensional tangential velocity of air in bearing chamber increases with the enhanced rotor speeds, and decreases with the increasing sealing air mass flow rates. The experiment results show that as the rotor speeds or the sealing air mass flow rates increase, the experimental data of air pressures agree more with the computational results. The operating parameters from computational and experiment can contribute to further complete the research on aspects of the air in bearing chamber.
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Key words:
- bearing chamber /
- air /
- flow field /
- aero-engine /
- pressure experiment
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[1] 林基恕,张振波.21 世纪航空发动机动力传输系统的展望[J].航空动力学报,2001,16(2):108-114. LIN Jishu,ZHANG Zhenbo.Prospects of aeroengine power transmission system in the 21st century[J].Journal of Aerospace Power,2001,16(2):108-114.(in Chinese) [2] Wittig S,Glahn A,Himmelsbach J.Influence of high rotational speeds on heat transfer and oil film thickness in aero -engine bearing chambers[J].Journal of Engineering for Gas Turbines and Power,1994,116(2):395-401. [3] Gorse P,Busam S,Dullenkopf K.Influence of operating condition and geometry on the oil film thickness in aeroengine bearing chambers[J].Journal of Engineering for Gas Turbines and Power,2006,128(1):103-110. [4] Farrall M,Simmons K,Hibberd S,et al.A numerical model for oil film flow in an aeroengine bearing chamber and comparison to experimental data[J].Journal of Engineering for Gas Turbines and Power,2006,128(1):111-117. [5] Farrall M,Hibberd S,Simmons K.The effect of initial injection conditions on the oil droplet motion in a simplified bearing chamber[J].Journal of Engineering for Gas Turbines and Power,2008,130(1):012501.1-012501.7. [6] Rodkey S C,Heister S D,Collicott S H.Physics of gas turbine engine bearing chambers[R].AIAA-2007-5033,2007. [7] 刘亚军,陈国定,王军.高转速下轴承腔内壁油膜流动建模[J].航空动力学报,2010,25(8):1900-1905. LIU Yajun,CHEN Guoding,WANG Jun.Flow modeling of oil film on bearing chamber wall at high-speed[J].Journal of Aerospace Power,2010,25(8):1900-1905.(in Chinese) [8] Chandra B,Simmons K,Pickering S,et al.Liquid and gas flow behaviour in highly rotating environment[R].ASME Paper GT2011-46430,2011. [9] Maqableh A,Simmons K,Hibberd S,et al.CFD modeling of three-component air/oil flow and heat transfer in a rotating annulus[C]//Proceeding of 11th International Conference of CFD.Vancouver,Canada:CFD Society of Canada,2003:256-263. [10] YUAN Xichuan,GUO Hui,WANG Liangyun.Experiment study of heat transfer in aeroengine bearing chambers[J].Applied Mechanics and Materials,2011,86:448-453. [11] Farrall M,Hibberd S,Simmons K,et al.Prediction of air oil exit flows in a commercial aeroengine bearing chamber[J].Journal of Aerospace Engineering,2006,220(3):197-202. [12] Gorse P,Willenborg K,Busam S,et al.3D-LDA measurements in an aero-engine bearing chamber[C]//Proceedings of ASME Turbo Expo 2003 Power for Land,Sea and Air.Atlanta,Georgia,USA:ASME,2003:257-265. [13] Lee C W,Palma P C,Simmons K,et al.Comparison of computational fluid dynamics and particle image velocimetry data for the airflow in an aeroengine bearing chamber[J].Journal of Engineering for Gas Turbines and Power,2005,127(4):697-703. [14] Aidarinis J,Missirlis D,Yakinthos K,et al.CFD modeling and LDA measurements for the air-flow in an aero engine front bearing chamber[J].Journal of Engineering for Gas Turbines and Power,2011,133(8):082504.1-082504.8. [15] 王军,陈国定,刘亚军.腔型/旋转结构空间的气相介质流动分析[J].机械设计与制造,2010(10):192-194. WANG Jun,CHEN Guoding,LIU Yajun.The analysis of airflow in the chamber-rotating structure[J].Machinery Design and Manufacture,2010(10):192-194.(in Chinese) [16] 陈薄,陈国定,张永红,等.航空发动机轴承腔气相速度场数值模拟[J].机械科学与技术,2012,31(8):1241-1246. CHEN Bo,CHEN Guoding,ZHANG Yonghong,et al.Numerically simulating airflow field inside aeroengine bearing chamber[J].Mechanical Science and Technology,2012,31(8):1241-1246.(in Chinese) [17] 汪友勇,王锁芳,艾俊峰,等.轴承腔油气两相流数值模拟的试验验证[J].航空动力学报,2013,28(3):629-635. WANG Youyong,WANG Suofang,AI Junfeng,et al.Experimental verification of numerical simulation of oil-air two-phase flow in bearing chamber[J].Journal of Aerospace Power,2013,28(3):629-635.(in Chinese) [18] Menter F R.Two-equation eddy-viscosity turbulence models for engineering applications[J].AIAA Journal,1994,32(8):1598-1605.
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