Development of formulation Q1As method for quadrupole noise prediction around a submerged cylinder

다국어 초록 (Multilingual Abstract)

Recent research has shown that quadrupole noise has a significant influence on the overall characteristics of flow-induced noise and on the performance of underwater appendages such as sonar domes. However, advanced research generally uses the Ffowcs WilliamseHawkings analogy without considering the quadrupole source to reduce computational cost. In this study, flow-induced noise is predicted by using an LES turbulence model and a developed formulation, called the formulation Q1As method to properly take into account the quadrupole source. The noise around a circular cylinder in an underwater environment is examined for two cases with different velocities. The results from the method are compared to those obtained from the experiments and the permeable FWeH method. The results are in good agreement with the experimental data, with a difference of less than 1 dB, which indicates that the formulation Q1As method is suitable for use in predicting quadrupole noise around underwater appendages.

참고문헌 (Reference)

1 Orselli, R. M., "Two and Three-dimensional Simulation of Sound Generated by Flow Around a Circular Cylinder" American Institute of Aeronautics and Astronautics, AIAA 2009-3270, 2009

2 Woen-Sug Choi, "Turbulence-induced noise of a submerged cylinder using a permeable FW-H method" 대한조선학회 8 (8): 235-242, 2016

3 Schmitz, F. H., "Theoretical modeling of high-speed helicopter impulsive noise" 1977

4 Farassat, F., "The uses and abuses of the acoustic analogy in helicopter rotor noise prediction" 33 : 29-36, 1987

5 Curle, N., "The influence of solid boundaries upon aerodynamic sound" 231 (231): 505-514, 1955

6 Hanson, D. B., "The importance of quadrupole sources in prediction of transonic tip speed propeller noise" 62 : 19-38, 1979

7 Ffowcs Williams, J. E., "Sound generation by turbulence and surfaces in arbitrary motion" 264 (264): 321-342, 1969

8 Ianniello, S., "Ship underwater noise assessment by the acoustic analogy, part II: hydroacoustic analysis of a ship scaled model" 19 : 52-74, 2014

9 Jasak, H., "OpenFOAM: open source CFD in research and industry" 1 : 89-94, 2009

10 OpenFOAM, "OpenFOAM the Open Source CFD Toolbox User Guide"

11 Lighthill, M. J., "On sound generated aerodynamically, I: general theory" 221 : 564-587, 1952

12 Brentner, K. S., "Modeling aerodynamically generated sound of helicopter rotors" 39 : 83-120, 2003

13 Zhang, H., "Large-eddy simulation of the flow past both finite and infinite circular cylinders at Re ¼ 390" 27 : 195-203, 2015

14 Norberg, C., "Fluctuating lift on a circular cylinder: review and new measurement" 17 (17): 57-96, 2003

15 Farassat, F., "Derivation of Formulations 1 and 1A of Farassat" NASA 2007

16 Wang, M., "Computational prediction of flowgenerated sound" 38 : 483-512, 2006

17 Ansys, "Ansys Fluent 12.0 Theory Guide"

18 Brentner, K. S., "An efficient and robust method for predicting helicopter rotor high-speed impulsive noise" 203 (203): 87-100, 1997

19 Weller, H. G., "A tensorial approach to computational continuum mechanics using object-oriented techniques" 12 (12): 620-631, 1998

20 Di Francescantonio, D., "A new boundary integral formulation for the prediction of sound radiation" 202 (202): 491-509, 1997

21 Park, I. C., "2-dimensional Simulation of Flow-induced Noise Around Circular Cylinder" Chungnam University 2012