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论文:2013,Vol:31,Issue(3):345-349 |
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李林, 胡春波, 邓哲, 李佳明. 喷管尺寸对火箭发动机喷流噪声影响研究[J]. 西北工业大学 |
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Li Lin, Hu Chunbo, Deng Zhe, Li Jiaming. Exploring Effects of Nozzle Size on Jet Noise of Rocket Engine[J]. Northwestern polytechnical university |
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| 喷管尺寸对火箭发动机喷流噪声影响研究 |
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| 李林, 胡春波, 邓哲, 李佳明 |
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| 西北工业大学 航天学院, 陕西 西安 710072 |
| 摘要: |
| 为了研究喷管尺寸对火箭发动机喷流噪声声场分布的影响规律,采用LES与FW-H相结合的方法,针对不同喷管尺寸的高温燃气喷流气动声场进行了数值模拟,并分析了声场特性。数值结果表明,火箭发动机喷流远场噪声具有方向性,噪声声压级在离开喷流中心轴线40°处达到最大值;喷流噪声声场的声压级随着喷管尺寸的增大而增加。研究结果为不同尺寸的火箭发动机喷流噪声预测提供参考依据。 |
| 关键词:
火箭发动机
喷流噪声
数值模拟
大涡模拟
喷管尺寸
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| Exploring Effects of Nozzle Size on Jet Noise of Rocket Engine |
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| Li Lin, Hu Chunbo, Deng Zhe, Li Jiaming |
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| College of Astronautics,Northwestern Polytechnical University,Xi'an 710072,China |
| Abstract: |
| In order to predict the distribution of sound fields of the jet noise of a rocket engine, we performed the numerical simulation of the aerodynamic sound field of the noise of high-temperature jet of nozzles of different sizes and analyzed the characteristics of the sound field.Then, we designed the three types of nozzles with the same out-let Mach number but different sizes and simulated their jet noise and analyzed its sound field distribution and the effects of nozzle sizes on the jet noise of a rocket engine.The simulation results, given in Figs.5 through 9, and their analysis show preliminarily that: (1) the noise at the far field of the jet is directional; (2) the sound pressure level of the jet noise reaches maximum at the angle of 40°away from the jet center axis; (3) the sound pressure lev-el of the jet noise sound field increases with increasing nozzle sizes. |
| Key words:
computer simulation
rocket nozzles
rocket engines
numerical methods
sound field
jet noise
nozzle size
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| 收稿日期: 2012-06-12
修回日期:
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| DOI: |
| 基金项目: 国家自然科学基金(50976095)资助 |
| 通讯作者:
Email： |
| 作者简介: 李林(1986-),西北工业大学硕士研究生,主要从事航空宇航科学与技术研究。
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| 作者相关文章 |
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| 李林 在本刊中的所有文章 |
| 胡春波 在本刊中的所有文章 |
| 邓哲 在本刊中的所有文章 |
| 李佳明 在本刊中的所有文章 |
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参考文献: |
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[6] 汪洋海, 李晓东.超音喷流啸音发声机理的实验研究.工程热物理学报, 2006, 03: 32-03 Wang Yanghai, LI Xiaodong.On the Generation Mechanisms of Supersonic Jet Screech Tones.Journal of Engineering Thermophysics, 2006 03: 32-03 (in Chinese)
[7] 徐 悦, 周 旭等.火箭发动机燃气射流喷水降噪研究.航空动力学报, 2010, 25(04): 816-820 Xu Yue, Zhou Xu, et al.Reduction of Rocket Engine Jet Noise by Water Injection.Journal of Aerospace Power, 2010, 25 (04): 816-820 (in Chinese) |
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相关文献: |
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1．彭小波, 李林, 李佳明, 胡春波.高温超音速喷流噪声场分布特性研究[J]. 西北工业大学, 2012,30(5): 779-783 |
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