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Experiments on Jet Noise Reduction with a Liquid Column

Experiments on Jet Noise Reduction with a Liquid Column A liquid column is designed and placed into the tail tube to effectively reduce the gas jet noise of a single rocket. The diffusion and mixing process of high-temperature high-pressure gas flow in the liquid water column in the air is studied by means of a high speed photographic system. The gas–liquid mixture jet noise has also been measured. The experimental results indicate that, when the liquid water column is put into the tail tube, the jet flow structure is changed and the jet flow parameters (velocity, temperature, etc.) are decreased due to the interaction of the gas jet with the liquid column. In addition, the jet noise is significantly reduced in the presence of the liquid column, compared with the condition without the liquid column. When the mass of the liquid column increases to 1.485 kg, the jet noise is reduced to a minimum in the shooter location. The peak sound pressure level also decreases with increasing polar angle. Most importantly, the thrust performance of the rocket engine is maintained when the liquid column is introduced. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Acoustics Australia Springer Journals

Experiments on Jet Noise Reduction with a Liquid Column

Zhang, Lei; Wang, Hao; Ruan, Wen-jun
Acoustics Australia , Volume 44 (2) – May 10, 2016
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Publisher
Springer Journals
Copyright
Copyright © 2016 by Australian Acoustical Society
Subject
Engineering; Engineering Acoustics; Acoustics; Noise Control
ISSN
0814-6039
eISSN
1839-2571
DOI
10.1007/s40857-016-0056-5
Publisher site
See Article on Publisher Site

Abstract

A liquid column is designed and placed into the tail tube to effectively reduce the gas jet noise of a single rocket. The diffusion and mixing process of high-temperature high-pressure gas flow in the liquid water column in the air is studied by means of a high speed photographic system. The gas–liquid mixture jet noise has also been measured. The experimental results indicate that, when the liquid water column is put into the tail tube, the jet flow structure is changed and the jet flow parameters (velocity, temperature, etc.) are decreased due to the interaction of the gas jet with the liquid column. In addition, the jet noise is significantly reduced in the presence of the liquid column, compared with the condition without the liquid column. When the mass of the liquid column increases to 1.485 kg, the jet noise is reduced to a minimum in the shooter location. The peak sound pressure level also decreases with increasing polar angle. Most importantly, the thrust performance of the rocket engine is maintained when the liquid column is introduced.

Journal

Acoustics Australia – Springer Journals

Published: May 10, 2016

References

  • Improved empirical methods for rocket noise prediction through CAA computation of elementary source field
    Damiano, C; Mattia, B
  • Impact study of nozzle size on the supersonic jet noise
    Han, L; Hu, C
  • Prediction of Turbulent Jet Mixing Noise Reduction by Water Injection
    Kandula, M
  • Computational fluid dynamics modeling of gas jets impinging onto liquid pools
    Nguyen, A; Geoffrey, E
  • Control of supersonic impinging jet flows using supersonic microjets
    Alvi, FS; Shih, C; Elavarasan, R
  • Broadband shock noise reduction in turbulent jets by water injection
    Kandula, M
  • Turbulence and noise suppression of a high-speed jet by water injection
    Krothapalli, A; Venkatakrishnan, L; Lourenco, L
  • The distortion of a jet by tabs
    Bradbury, LJS; Khadem, AH
  • Principle of Solid Rocket Motor
    Dong, S; Zhang, Z