Browse > Article
http://dx.doi.org/10.5050/KSNVN.2009.19.11.1222

Noise Reduction Effect of an Air Bubble Layer on an Infinite Flat Plate Considering the Noise of Multi-bubbles  

Kim, Jong-Chul (국방과학연구소 제 6기술연구본부)
Heo, Bo-Hyun (국방과학연구소 제 6기술연구본부)
Cho, Dae-Seung (부산대학교 조선해양공학과)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.19, no.11, 2009 , pp. 1222-1230 More about this Journal
Abstract
A theoretical model was developed to compute the effect of a bubble layer in reducing the radiation noise generated by a force applied on an infinite flat plate considering the noise of multi-bubbles. Using the model, the effectiveness of a bubble layer in reducing the structure-borne noise of the plate was evaluated to consider various parameters such as the source noise levels, the thickness of bubble layers, the volume fractions and the frequency characteristics of bubbly fluids. Considering the noise of multi-bubbles, the actual reduction effect of radiation noise using a bubble layer was expected in cases of high source levels, high volume fractions of bubbles and large thickness of the bubble layer above the resonance frequency of the bubble layer. Accordingly, it is recommended that the thickness of a bubble layer, the source noise level and the characteristics of bubbly fluids should be optimized cautiously to maximize noise reduction effects.
Keywords
Air Bubble; Bubble Layer; Bubble Fluid; Radiation Noise; Noise Reduction;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 Kim, J. C., Oh, J. S. and Cho, D. S., 2006, 'Investigation on Shapes and Acoustic Characteristics of Air Bubbles Generated by an Underwater Nozzle,' Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 16, No. 2, pp. 190-197   DOI   ScienceOn
2 Junger, M. C. and Cole, J. E., 1980, 'Bubble Swarm Acoustics: Insertion Loss of a Layer on a Plate,' J. Acoustical. Soc. America, Vol. 68, pp. 241-247   DOI   ScienceOn
3 Feit, D., 1966, 'Pressure Radiated by a Pointexcited Elastic Plate,' J. Acoustical. Soc. America, Vol. 40, pp. 1489-1494   DOI
4 Kim, J. C., Oh, J. S. and Cho, D. S., 2007, 'Noise Reduction Effect of an Air Bubble Layer on an Infinite Flat Plate,' Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 17, No. 2, pp. 168-176   DOI   ScienceOn
5 Yoon, S. W., Crum, L. A. and Prosperetti, A., 1989, 'An Experimental Clouds as Sources of Ambient Noise,' J. Acoustical Soc. America, Vol. 86, S88
6 Lurton, X., 2002, 'An Introduction to Underwater Acoustics; Principles and Application,' Springer Praxis Publishing
7 Prosperetti, A., 1985, 'Bubble-related Ambient Noise in the Ocean,' J. Acoustical. Soc. America, Vol. 78, S2
8 Leighton, T. G., 1994, 'The Acoustic Bubble,' Academic Press
9 Ko, S.-H., et al., 2001, 'Structure-borne and Flow Noise Reductions,' SNU Press
10 Kinsler, L. E., Frey, A. R., Coppens, A. B. and Sanders, J. V., 1982, 'Fundamentals of 'John Wiley & Sons
11 Clay, C. S. and Medwin, H., 1977, 'In Acoustical Oceanography: Principle and Applications,' John wiley & Sons, pp. 178-215
12 Kelley, C. T., 1981, 'Experimental Study of Noise Produced by an Underwater Acoustic Bubble Screen,' Naval Postgraduate School
13 Wursig, B., Greene, C. R. and Jefferson, T. A., 2000, 'Development of an Air Bubble Curtain to Reduce Underwater Noise of Percussive Piling,' Marine Environmental Research 49, pp. 79-93   DOI   ScienceOn
14 Naval Sea Systems Command, 1995, 'Underwater Ship Husbandry Manual,' NAVSEA Publication S0600-AA-PRP-050