吸气式高超声速飞行器助推分离过程数值仿真
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摘要
针对吸气式高超声速冲压发动机验证性试验特殊的飞行环境和助推分离条件,以某轴对称吸气式高超声速飞行器级间分离问题为具体研究对象,采用非结构网格局部网格重构技术和非定常问题非定常六自由度问题仿真方法,对该复杂构型飞行器助推分离过程进行数值计算。研究得到弱干扰冷态分离状态下飞行器及助推器的运动参数和气动力参数在分离过程中的发展规律。对0.3 s内助推器的位移轨迹进行分析,判断分离方案的可行性,并给出最佳的分离工况条件。
Aiming at the special environment of the air-breathing hypersonic ramjet flight test, especially the booster separation conditions, the multi-body separation of an axisymmetric hypersonic aircraft was studied. Six degrees of freedom solver and local mesh reconstruction based on non-structured mesh method were proposed to simulate the separation process. Results include motion parameters of the booster and the aerodynamic characteristics ranging from 0 ms to 300 ms for the aircraft under the weak perturbance states. Meanwhile, the trajectory curve of separation was demonstrated. Finally, the feasibility of the subsequent scheme was estimated and the optimal conditions for the separation reached requirement of mild interference.
Aiming at the special environment of the air-breathing hypersonic ramjet flight test, especially the booster separation conditions, the multi-body separation of an axisymmetric hypersonic aircraft was studied. Six degrees of freedom solver and local mesh reconstruction based on non-structured mesh method were proposed to simulate the separation process. Results include motion parameters of the booster and the aerodynamic characteristics ranging from 0 ms to 300 ms for the aircraft under the weak perturbance states. Meanwhile, the trajectory curve of separation was demonstrated. Finally, the feasibility of the subsequent scheme was estimated and the optimal conditions for the separation reached requirement of mild interference.
引文
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[17] Togashi F, Nakahashi K, Ito Y, et al. Flow simulation of NAL experimental supersonic airplane/booster separation using overset unstructured grids[J]. Computers & Fluids, 2001, 30(6): 673-688.
[18] Li Y, Reimann B, Eggers T. Coupled simulation of CFD-flight-mechanics with a two-species-gas-model for the hot rocket staging[J]. Acta Astronautica, 2016, 128: 44-61.
[19] 曾铮, 王刚, 叶正寅. RBF整体网格变形技术与多体轨迹仿真[J].空气动力学学报, 2015, 33(2): 170-177.ZENG Zheng, WANG Gang, YE Zhengyin. Enhanced RBF mesh deformation method and multi-body trajectory simulation[J]. Acta Aerodynamica Sinica, 2015, 33(2): 170-177. (in Chinese)
[2] Dharavath M, Manna P, Chakraborty D. Tip-to-tail numerical simulation of a hypersonic air-breathing engine with ethylene fuel [J]. Acta Astronautica, 2016, 128: 107-118.
[3] 王宏伟, 郭建国, 林鹏, 等.临近空间飞行器多体分离气动分析[J].飞行力学, 2012, 30(3): 250-253.WANG Hongwei, GUO Jianguo, LIN Peng,et al. Aerodynamic analysis on separation of cluster munition in near space [J].Flight Dynamics, 2012, 30(3): 250-253.( in Chinese)
[4] McClinton C R, Ransch V L, Shaw R J, et al. Hyper-X:foundation for future hypersonic launch vehicles[J]. Acta Astronautica, 2005, 57(2/3/4/5/6/7/8): 614-622.
[5] Lockwood M K, Petley D H, Martin J G, et al. Airbreathing hypersonic vehicle design and analysis methods and interactions[J]. Progress in Aerospace Sciences, 1999, 35(1): 1-32.
[6] Ji Y M, Kim Y S, Lee J W, et al. Effect of C.G. and control surface area on supersonic separation of an air-launching rocket from the mother plane [J]. Aerospace Science and Technology, 2010, 14(1): 19-25.
[7] Feng X, Bai W. Hydrodynamic analysis of marine multibody systems by a nonlinear coupled model [J]. Journal of Fluids and Structures, 2017, 70: 72-101.
[8] 张一帆.多体分离数值模拟及方法验证[J].航空计算技术, 2013, 43(6): 63-65.ZHANG Yifan.Validation research on multi-body separation simulation[J]. Aviation Computing Technology, 2013, 43(6): 63-65. (in Chinese)
[9] Santini P, Gasbarri P. General back ground and approach to multibody dynamics for space applications [J]. Acta Astronautica, 2009, 64(11/12): 1224-1251.
[10] 张海瑞, 袁武, 范晶晶, 等.重叠网格方法研究多子弹抛撒气动问题[J].国防科技大学学报, 2014, 36(5): 15-20.ZHANG Hairui, YUAN Wu, FAN Jingjing, et al.Investigation of cluster bomb projection aerodynamic problem using overset grid method [J]. Journal of National University of Defense Technology, 2014, 36(5): 15-20. (in Chinese)
[11] Chamberlain R R, Baltar J Y. Time accurate calculation of hypersonic shroud separation[C]//Proceedings of 31st Aerospace Sciences Meeting, 1993.
[12] Ling Q, He Y, He Y, et al. Dynamic response of multibody structure subjected to blast loading [J]. European Journal of Mechanics—A/Solids, 2017, 64: 46-57.
[13] Wasfy T M, Noor A K. Visualization of CFD results in immersive virtual environments[J]. Advances in Engineering Software, 2001, 32(9): 717-730.
[14] Michaels D, Gany A. Modeling and testing of a tube-in-tube separation mechanism of bodies in space[J]. Acta Astronautica, 2016, 129: 214-222.
[15] Nowakowski P, Okninski A, Pakosz M, et al. Development of small solid rocket boosters for the ILR-33 sounding rocket[J]. Acta Astronautica, 2017, 138: 374-383.
[16] 王元靖, 钱丰学, 畅利侠, 等. 超声速条件下多体干扰与分离试验研究[J].实验流体力学, 2014, 28(3): 58-62.WANG Yuanjing, QIAN Fengxue, CHANG Lixia,et al. Investigation on multi-body interference and separation by grid force measurement at supersonic condition [J]. Journal of Experiments in Fluid Mechanics, 2014, 28(3): 58-62. (in Chinese)
[17] Togashi F, Nakahashi K, Ito Y, et al. Flow simulation of NAL experimental supersonic airplane/booster separation using overset unstructured grids[J]. Computers & Fluids, 2001, 30(6): 673-688.
[18] Li Y, Reimann B, Eggers T. Coupled simulation of CFD-flight-mechanics with a two-species-gas-model for the hot rocket staging[J]. Acta Astronautica, 2016, 128: 44-61.
[19] 曾铮, 王刚, 叶正寅. RBF整体网格变形技术与多体轨迹仿真[J].空气动力学学报, 2015, 33(2): 170-177.ZENG Zheng, WANG Gang, YE Zhengyin. Enhanced RBF mesh deformation method and multi-body trajectory simulation[J]. Acta Aerodynamica Sinica, 2015, 33(2): 170-177. (in Chinese)