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论文:2022,Vol:40,Issue(5):1080-1089 |
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引用本文： |
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余元元, 王方元, 王彬, 孙建红, 许常悦, 孙智. 超声速火箭橇流动特征和气动力激励振动分析[J]. 西北工业大学学报 |
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YU Yuanyuan, WANG Fangyuan, WANG Bin, SUN Jianhong, XU Changyue, SUN Zhi. Analysis on flow characteristics and aerodynamic-force-induced vibration of supersonic rocket-sled[J]. Journal of Northwestern Polytechnical University |
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| 超声速火箭橇流动特征和气动力激励振动分析 |
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| 余元元1, 王方元1, 王彬1, 孙建红1,2, 许常悦1, 孙智2 |
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1. 南京航空航天大学 飞行器环境控制与生命保障工业与信息化部重点实验室, 江苏 南京 210016;
2. 南京航空航天大学 民航应急科学与技术重点实验室, 江苏 南京 211106 |
| 摘要: |
| 目前,火箭橇试验是飞行器空气动力学重要试验手段,然而强烈的地面与轨道干扰会影响试验的精度,甚至导致试验失败。采用尺度自适应SAS方法和基于铺层算法的动网格技术对不同马赫数下的超声速火箭橇滑行过程进行数值模拟,探究了超声速火箭橇的气动力致振机理。采用了数值风洞模拟方法对超声速火箭橇无限空间绕流和仅包含地面的橇体绕流进行仿真,分析了不同环境条件下的激波特征。结果表明:超声速火箭橇的头激波传播至轨道和地面时会发生激波反射,反射激波的存在会导致超声速火箭橇产生升力,并带来阻力的略微增加;反射激波与轨道扣件的周期性碰撞使得其尾迹区具有非定常特征;火箭橇的气动力激励振动频率与尾迹波动频率一致,即气动力激励振动对非定常尾迹具有锁频现象。此外,压力信号的功率谱密度分析表明气动力激励振动存在谐声现象,这与锁频现象密切相关。 |
| 关键词:
火箭橇
动网格
激波
超声速流动
尺度自适应模拟
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| Analysis on flow characteristics and aerodynamic-force-induced vibration of supersonic rocket-sled |
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| YU Yuanyuan1, WANG Fangyuan1, WANG Bin1, SUN Jianhong1,2, XU Changyue1, SUN Zhi2 |
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1. Key Laboratory of Aircraft Environment Control and Life Support, MIIT, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;
2. Key Laboratory of Civil Aviation Emergency Science and Technology, CAAC, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China |
| Abstract: |
| Nowadays, the rocket-sled test is an important experimental method of vehicle aerodynamics, while the experimental accuracy will be badly affected by the strong interaction of ground and orbit, even leading to the testing failure. Numerical simulations of supersonic rocket-sled during dynamic gliding at different Mach numbers were carried out by using a scale-adaptive simulation (SAS) method and a dynamic grid technique based on a tiling algorithm, and the aerodynamic-force-induced vibration mechanism of supersonic rocket-sled was investigated. Numerical wind tunnel technique was also used to simulate the supersonic flow around rocket-sled in the infinite and ground-only environmental space, and the shock wave characteristics at different environmental conditions were analyzed. Study results shown that: the head-shock of supersonic rocket-sled propagated to the orbit and ground with a reflected shock; For the supersonic rocket-sled, the presence of reflected shock leaded to the generation of lift and a slight increase of drag; The unsteady wake was closely associated with the periodic collision between the reflected shock and rail fasteners; The aerodynamic-force-induced vibration frequency of supersonic rocket-sled was equal to the wake fluctuation frequency, i.e., the aerodynamic-force-induced vibration had a frequency locking effect on the unsteady wake. Furthermore, the power spectral density analysis of pressure signal shown that there was a harmonic phenomenon in the aerodynamic-force-induced vibration, which was closely related to the frequency locking phenomenon. |
| Key words:
rocket-sled
dynamic grid
shock wave
supersonic flow
scale-adaptive simulation
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| 收稿日期: 2022-01-12
修回日期:
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| DOI: 10.1051/jnwpu/20224051080 |
| 基金项目: 国家自然科学基金(12172172)、航空科学基金(20200029052001)与江苏高校优势学科建设工程项目资助 |
| 通讯作者: 许常悦(1981-),南京航空航天大学副教授,主要从事人机与环境工程研究。e-mail:cyxu@nuaa.edu.cn
Email：cyxu@nuaa.edu.cn |
| 作者简介: 余元元(1974—),南京航空航天大学博士研究生,主要从事人机与环境工程研究。
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| 相关功能 |
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| 作者相关文章 |
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| 余元元 在本刊中的所有文章 |
| 王方元 在本刊中的所有文章 |
| 王彬 在本刊中的所有文章 |
| 孙建红 在本刊中的所有文章 |
| 许常悦 在本刊中的所有文章 |
| 孙智 在本刊中的所有文章 |
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