Acoustic Modeling and Vibration Characteristics of Supersonic Inlet Buzz
The buzz phenomenon of a typical supersonic inlet is analyzed on the basis of numerical simulations and duct acoustic theory. Considering that the choked inlet could be treated as a duct with one end closed, a one-dimensional (1D) mathematical model based on the duct acoustic theory is proposed to d...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-04-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/13/8/2048 |
| _version_ | 1827718288810967040 |
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| author | Jianfeng Zhu Wenguo Luo Yuqing Wei Cheng Yan Yancheng You |
| author_facet | Jianfeng Zhu Wenguo Luo Yuqing Wei Cheng Yan Yancheng You |
| author_sort | Jianfeng Zhu |
| collection | DOAJ |
| description | The buzz phenomenon of a typical supersonic inlet is analyzed on the basis of numerical simulations and duct acoustic theory. Considering that the choked inlet could be treated as a duct with one end closed, a one-dimensional (1D) mathematical model based on the duct acoustic theory is proposed to describe the periodic pressure oscillation of the little buzz and the big buzz. The results of the acoustic model agree well with that of the numerical simulations and the experimental data. It could verify that the dominated oscillation patterns of the little buzz and the big buzz are closely related to the first and second resonant mode of the standing wave, respectively. The discrepancies between the numerical simulation and the ideal acoustic model might be attributed to the viscous damping in the fluid oscillation system. In order to explore the damping, a small perturbation jet is introduced to trigger the resonance of the buzz system and the nonlinear amplification effect of resonance might be helpful to estimate the damping. Through the comparison between the linear acoustic model and the nonlinear simulation, the calculated pressure oscillation damping of the little buzz and the big buzz are 0.33 and 0.16, which could be regarded as an estimation of real damping. |
| first_indexed | 2024-03-10T20:21:03Z |
| format | Article |
| id | doaj.art-3555568dd60b464db91254aa6ac04e85 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T20:21:03Z |
| publishDate | 2020-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-3555568dd60b464db91254aa6ac04e852023-11-19T22:09:14ZengMDPI AGEnergies1996-10732020-04-01138204810.3390/en13082048Acoustic Modeling and Vibration Characteristics of Supersonic Inlet BuzzJianfeng Zhu0Wenguo Luo1Yuqing Wei2Cheng Yan3Yancheng You4School of Aerospace Engineering, Xiamen University, Xiamen 361005, ChinaSchool of Aerospace Engineering, Xiamen University, Xiamen 361005, ChinaSchool of Aerospace Engineering, Xiamen University, Xiamen 361005, ChinaSchool of Aerospace Engineering, Xiamen University, Xiamen 361005, ChinaSchool of Aerospace Engineering, Xiamen University, Xiamen 361005, ChinaThe buzz phenomenon of a typical supersonic inlet is analyzed on the basis of numerical simulations and duct acoustic theory. Considering that the choked inlet could be treated as a duct with one end closed, a one-dimensional (1D) mathematical model based on the duct acoustic theory is proposed to describe the periodic pressure oscillation of the little buzz and the big buzz. The results of the acoustic model agree well with that of the numerical simulations and the experimental data. It could verify that the dominated oscillation patterns of the little buzz and the big buzz are closely related to the first and second resonant mode of the standing wave, respectively. The discrepancies between the numerical simulation and the ideal acoustic model might be attributed to the viscous damping in the fluid oscillation system. In order to explore the damping, a small perturbation jet is introduced to trigger the resonance of the buzz system and the nonlinear amplification effect of resonance might be helpful to estimate the damping. Through the comparison between the linear acoustic model and the nonlinear simulation, the calculated pressure oscillation damping of the little buzz and the big buzz are 0.33 and 0.16, which could be regarded as an estimation of real damping.https://www.mdpi.com/1996-1073/13/8/2048supersonic inlet buzzacoustic modelingoscillation amplitudedamping |
| spellingShingle | Jianfeng Zhu Wenguo Luo Yuqing Wei Cheng Yan Yancheng You Acoustic Modeling and Vibration Characteristics of Supersonic Inlet Buzz Energies supersonic inlet buzz acoustic modeling oscillation amplitude damping |
| title | Acoustic Modeling and Vibration Characteristics of Supersonic Inlet Buzz |
| title_full | Acoustic Modeling and Vibration Characteristics of Supersonic Inlet Buzz |
| title_fullStr | Acoustic Modeling and Vibration Characteristics of Supersonic Inlet Buzz |
| title_full_unstemmed | Acoustic Modeling and Vibration Characteristics of Supersonic Inlet Buzz |
| title_short | Acoustic Modeling and Vibration Characteristics of Supersonic Inlet Buzz |
| title_sort | acoustic modeling and vibration characteristics of supersonic inlet buzz |
| topic | supersonic inlet buzz acoustic modeling oscillation amplitude damping |
| url | https://www.mdpi.com/1996-1073/13/8/2048 |
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