A Numerical Study on the Aeroacoustic Radiation from a Finite Length Rotating Cylinder

Document Type : Original Article


1 School of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran

2 Malek Ashtar University, Tehran, Iran


Rotating cylinders have wide applications in different areas, especially the aerodynamic area. However, the acoustic behaviors of these components have not been widely studied. The generating noise from a spinning cylinder is mainly due to the detached vortices from the leeward of the body. In this study, the large eddy simulation technique is used to simulate the flow field over a three-dimensional cylinder. In the following, the Ffowcs Williams and Hawkings equation is used to estimate the noise at the specified locations using the oscillating pressure components on the cylinder wall. The acoustic behavior of both stationary and rotating cylinders are studied. Results show that the acoustic behaviors of cylinders rotating with smaller frequencies (up to f=16f0, where f0 is the dominant detaching frequency of vortices on a stationary cylinder) are nearly the same. However, at higher rotational frequencies (24f0) where vortices are omitted, OASPL of the generated noise is reduced considerably (about 20 dB at different angles with constant radial positions, r=26D, at mid-span plane). On the other hand, when the rotational frequency is increased over this limit, the pressure oscillation on the wall becomes significant and the OASPL approaches higher values.


Main Subjects

Article Title [فارسی]

تحلیل عددی انتشار آکوستیکی یک سیلندر چرخان

Author [فارسی]

  • حمید پرهیزکار 2
[1] J. Seifert, A review of the Magnus effect in aeronautics, Progress in Aerospace Sciences, 55 (2012) 17-45.
[2] S. Mittal, B. Kumar, Flow past a rotating cylinder, Journal of Fluid Mechanics, 476 (2003) 303-334.
[3] N. Shao, G. Yao, C. Zhang, M. Wang, A New Method to Optimize the Wake Flow of a Vehicle:The Leading Edge Rotating Cylinder, Mathematical Problems in Engineering, 2017 (2017).
[4] K. Kussaiynov, N. Kadyralievna Tanasheva, M. Miryusupovich Turgunov, G. Meiramovna Shaimerdenova, A. Ravshanbekovna Alibekova, The Effect of Porosity on the Aerodynamic Characteristics of a Rotating Cylinder, Modern Applied Science, 9(2) (2015).
[5] R.I. Elghnam, Experimental and numerical investigation of heat transfer from a heated horizontal cylinder rotating in still air around its axis, Ain Shams Engineering Journal, 5 (2014) 177–185.
[6] P. Tokumaru, P. Dimotakis, Rotary oscillation control of cylinder wake, Journal of Fluid Mechanics, 224 (1991) 77–90.
[7] W. Williams, N. Parke, D. Moran, C.H. Sherman, Acoustic Radiation from a Finite Cylinder, The Journal of the Acoustical Society of America, 36(12) (1964) 2316-2322.
[8] V.R. Lauvstad, Aerodynamic Sound Generated by a Rotating Cylinder, The Journal of the Acoustical Society of America, 43(6) (1968).
[9] S. Farhadi, Acoustic radiation of rotating and non-rotating finite length cylinders, Journal of Sound and Vibration, 428 (2018) 59-71.
[10] C.C. Zhang, W.Q. Wang, L. Shi, J. Wang, L.Q. Ren, Experimental and Numerical Study on Aerodynamic Noise Reduction of Cylindrical Rod with Bionic Wavy Surface, in:  Applied Mechanics and Materials, Trans Tech Publ, 2014, pp. 690-701.
[11] H. Liu, J. Wei, Z. Qu, Prediction of aerodynamic noise reduction by using open-cell metal foam, Journal of Sound and Vibration, 331 (2012) 1483–1497.
[12] D.L.H. J. E. Ffowcs-Williams, Sound generation by turbulence and surfaces in arbitrary motion, Philosophical Transactions of the Royal Society of London A: Mathematical, Physical and Engineering Sciences, 264(1151) (1969) 321-342.
[13] K. Mobini, M. Niazi, Large Eddy Simulation of the Flow across a Rotating Circular Cylinder International Journal of Fluid Mechanics Research, 41(1) (2014).
[14] L. Shi, C. Zhang, J. Wang, L. Ren, Numerical simulation of the effect of bionic serrated structures on the aerodynamic noise of a circular cylinder, Journal of Bionic Engineering, 9 (1) (2012) 91-98.
[15] H. Liu, J. Wei, Z. Qu, Prediction of aerodynamic noise reduction by using open-cell metal foam, Journal of Sound and Vibration, 331(7) (2012) 1483-1497.
[16] J. Smagorinsky, General circulation experiments with the primitive equations: I. The basic experiment, Monthly weather review, Monthly weather review, 91(3) (1963) 99-164.
[17] J.D. Revell, R.A. Prydz, A.P. Hays, Experimental study of airframe noise vs. drag relationship for circular cylinders, Aiaa Journal, 16(9) (1978) 152-165.
[18]J.S. Cox, K.S. Brentner, C.L. Rumsey, Computation of vortex shedding and radiated sound for a circular cylinder: subcritical to transcritical Reynolds numbers, Theoretical and Computational Fluid Dynamics, 12(4) (1998) 233-253.
[19] M. Zdravkovich, Flow around circular cylinders volume 1: fundamentals, Oxford University Press, Oxford
[20] C. Kato, A. Iida, Y. Takano, H. Fujita, M. Ikegawa, Numerical prediction of aerodynamic noise radiated from low Mach number turbulent wake, in:  31st Aerospace Sciences Meeting, 1993, pp. 145.
[21] O. Inoue, N. Hatakeyama, Sound generation by a two-dimensional circular cylinder in a uniform flow, Journal of Fluid Mechanics, 471 (2002) 285–314.
[22] D.A. Lysenko, I.S. Ertesvåg, K.E. Rian, Towards simulation of far-field aerodynamic sound from a circular cylinder using OpenFOAM, International Journal of Aeroacoustics, 13(1-2) (2014) 141-168.
[23] R.S. Matoza, D. Fee, T.B. Neilsen, K.L. Gee, D.E. Ogden, Aeroacoustics of volcanic jets: Acoustic power estimation and jet velocity dependence, Journal of Geophysical Research: Solid Earth, 118(12) (2013) 6269–6284.
[24] D.A. Russell, J.P. Titlow, Y.-J. Bemmen, Acoustic monopoles, dipoles,and quadrupoles: An experiment revisited, American Journal Of Physics Journal Of Physics, 67(8) (1999) 660-664.