Analysis of Hydrodynamic Noise around Acoustic Modem on the AUV Using Hybrid LES-Lighthill Method

Abstract:

Acoustic modem is one of the most important sensors on the deep sea AUV. A good performance of the acoustic modem has great effect on the safety and operation of deep sea AUV. According to the construction of deep sea AUV, acoustic modem is installed in the cavity behind the GPS antenna, it would cause flow noise around the acoustic modem and thus interference will occur when the communication is established between deep sea AUV and surface. Flow-induced noise around the acoustic modem is studied in this paper. Firstly the unsteady flow around the acoustic modem is studied by large eddy simulation (LES) method. Secondly based on the resolved information of flow field, acoustic noise distribution is studied using equivalent acoustic sources method. Compared with different positions of GPS antenna, flow noise distribution around the acoustic modem and the effect on communication is investigated. Then acoustic modem layout on the AUV is optimized.

• Periodical: Advanced Materials Research (Volumes 546-547)
• Pages: 176-181
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.546-547.176
• Online since: July 2012
• Authors: Tong Hui Liu, Yan Hui Wang, Zhu Guang
• Keywords: Equivalent Sources Method, Hydrodynamic Noise, Large Eddy Simulation (LES), Numerical Simulation

References

[1] Lighthill M J. On sound generated aerodynamicallyⅠ: general theory [J]. Proceedings of the Royal Society of London, 1952, 211A(1107): 564-587.

[2] Ffowcs Williams J E, Hawkings D L. Sound Generation by Turbulence and Surfaces in Arbitrary Motion. Proceedings of the Royal Society of London, 1969, 264A: 321-342.

[3] Oberai A, Ronaldkin F, Hughes T. Computational procedures for determining structural-acoustic response due to hydrodynamic source [J]. Computer Methods in Applied Mechanics and Engineering, 2000, 190: 345-361.

DOI: 10.1016/s0045-7825(00)00206-1

[4] Oberai A, Ronaldkin F, Hughes T. Computational of tailing-edge noise due to turbulent flow over an airfoil[J]. AIAA Journal, 2002, 40(5): 2206-2216.

DOI: 10.2514/3.15312

[5] Skudrzyk E J, Haddle G P. Noise production in a turbulent boundary layer by smooth andrough surfaces[J]. J.A.S. A, 1960, 32(1): 19-34.

DOI: 10.1121/1.1907871

[6] Haddle G P, Skudrzyk E J. The physics of flow noise[J]. J.A.S. A, 1969, 46(1): 130-157.

[7] ZHANG Nan, SHEN Hong-cui, YAO Hui-zhi. Large eddy simulation of wall pressure fluctuations of underwater vehicle[J]. Chinese journal of hydrodynamics, 2010, 25(1): 106-112.

[8] Huiping FU and Guoping Miao. Application of LES Method to Flow Noise Calculation[J]. Journal of shang hai jiao tong university, 2009, 43(8): 1307-1311.

[9] Donghan geng, Zheng xian Liu. Prediction of cavity hydrodynamic noise by LES-Lighthill equivalent source method[J]. Journal of Harbin Engineering University, 2010, 31(2) : 182-187.

[10] WangYu, Liu Yuhong. Prediction of 3D cavity hydrodynamic noise based on equivalent source method[J]. Journal of Advanced Materials Research Vols. 189-193, (2011).

DOI: 10.4028/www.scientific.net/amr.189-193.53