0
Research Papers: Fluid-Structure Interaction

Passive Control of Trapped Mode Resonance of Ducted Cavities

[+] Author and Article Information
M. Bolduc, M. Elsayed, S. Ziada

Department of Mechanical Engineering,
McMaster University,
Hamilton, ON L8S4L7, Canada

Contributed by the Pressure Vessel and Piping Division of ASME for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received August 25, 2013; final manuscript received April 5, 2014; published online August 19, 2014. Assoc. Editor: Jong Chull Jo.

J. Pressure Vessel Technol 136(5), 051311 (Aug 19, 2014) (6 pages) Paper No: PVT-13-1144; doi: 10.1115/1.4027377 History: Received August 25, 2013; Revised April 05, 2014

Gas flow over ducted cavities can excite strong acoustic resonances within the confined volumes housing the cavities. When the wavelength of the resonant acoustic modes is comparable with, or smaller than, the cavity dimensions, these modes are referred to as trapped acoustic modes. The flow excitation mechanism causing the resonance of these trapped modes in axisymmetric shallow cavities has been investigated experimentally in a series of papers by Aly and Ziada (2010, “Flow-Excited Resonance of Trapped Modes of Ducted Shallow Cavities,” J. Fluids Struct., 26, pp. 92–120; 2011, “Azimuthal Behaviour of Flow-Excited Diametral Modes of Internal Shallow Cavities,” J. Sound Vib., 330, pp. 3666–3683; 2012, “Effect of Mean Flow on the Trapped Modes of Internal Cavities,” J. Fluids Struct., 33, pp. 70–84). In this paper, the same experimental set-up is used to investigate the effect of the upstream edge geometry on the acoustic resonance of trapped modes. The investigated geometries include sharp and rounded cavity corners, chamfering the upstream edge, and spoilers of different types and sizes. Rounding-off the cavity edges is found to increase the pulsation amplitude substantially, but the resonance lock-on range is delayed, i.e., it is shifted to higher flow velocities. Similarly, chamfering the upstream corner delays the onset of resonance, but maintains its intensity in comparison with that of sharp edges. Spoilers, or vortex generators, added at the upstream edge have been found to be the most effective means to suppress the resonance. However, the minimum spoiler size which is needed to suppress the resonance increases as the cavity size becomes larger.

Copyright © 2014 by ASME
Your Session has timed out. Please sign back in to continue.

References

Aly, K., and Ziada, S., 2010, “Flow-Excited Resonance of Trapped Modes of Ducted Shallow Cavities,” J. Fluids Struct., 26, pp. 92–120. [CrossRef]
Aly, K., and Ziada, S., 2011, “Azimuthal Behaviour of Flow-Excited Diametral Modes of Internal Shallow Cavities,” J. Sound Vib., 330, pp. 3666–3683. [CrossRef]
Aly, K., and Ziada, S., 2012, “Effect of Mean Flow on the Trapped Modes of Internal Cavities,” J. Fluids Struct., 33, pp. 70–84. [CrossRef]
Tonon, D., Hirschberg, A., Golliard, J., and Ziada, S., 2011, “Aeroacoustics of Pipe Systems With Closed Branches,” Int. J. Aeroacoustics, 10(2), pp. 201–276. [CrossRef]
Ziada, S., and Lafon, P., 2014, “Flow-Excited Acoustic Resonance: Excitation Mechanism, Design Guidelines and Counter-Measures,” ASME Appl. Mech. Rev.66, p. 011002. [CrossRef]
Arthurs, D., and Ziada, S., 2009, “Flow-Excited Acoustic Resonances of Coaxial Side-Branches in an Annular Duct,” J. Fluids Struct., 25, pp. 42–59. [CrossRef]
Ziada, S., and Buhlmann, E. T., 1989, “Flow Impingement as an Excitation Source in Control Valves,” J. Fluids Struct., 3, pp. 529–549. [CrossRef]
NRC, 2002, “Failure of Steam Dryer Cover Plate After a Recent Power Uprate,” US Nuclear Regulatory Commission, Washington, DC, NRC Information Notice 2002-26.
Howe, M. S., 1980, “The Dissipation of Sound at an Edge,” J. Sound Vib., 70, pp. 407–411. [CrossRef]
Rockwell, D., and Naudascher, E., 1978, “Review: Self- Sustaining Oscillations of Flow Past Cavities,” ASME J. Fluids Eng., 100, pp. 152–165. [CrossRef]
Evans, D. V., Levitin, M., and Vassiliev, D., 1994, “Existence Theorems for Trapped Modes,” J. Fluid Mech., 261, pp. 21–31. [CrossRef]
Kinsler, L. E., Frey, A. R., Coppens, A. B., and Sanders, J. V., 2000, Fundamentals of Acoustics, John Wiley & Sons, Inc., New York.
Hein, S., and Koch, W., 2008, “Acoustic Resonances and Trapped Modes in Pipes and Tunnels,” J. Fluid Mech., 605, pp. 401–428. [CrossRef]
Cattafesta, L., Williams, D. R., Rowley, C. W., and Alvi, F., 2003, “Review of Active Control of Flow-Induced Cavity Resonance, AIAA Fluid Dynamics Conference, AIAA Paper No. 2003-3567.
Bruggeman, J. C., Hirschberg, A., van Dongen, M. E. H., Wijnands, A. P. J., and Gorter, J., 1991, “Self-Sustained Aero-Acoustic Pulsations in Gas Transport Systems: Experimental Study of the Influence of Closed Side Branches,” J. Sound Vib., 150, pp. 371–393. [CrossRef]
Karadogan, H., and Rockwell, D., 1983, “Toward Attenuation of Self-Sustained Oscillations of a Turbulent Jet Through a Cavity,” ASME J. Fluids Eng., 105, pp. 335–340. [CrossRef]
Knotts, B. D., and Selamet, A., 2003, “Suppression of Flow-Acoustic Coupling in Side-Branch Ducts by Interface Modification,” J. Sound Vib., 265, pp. 1025–1045. [CrossRef]
Nakiboglu, G., and Hirschberg, A., 2010, “A Numerical Study of the Aeroacoustic Interaction of a Cavity With a Confined Flow: Effect of Edge Geometry in Corrugated Pipes,” Proceedings of ASME 3rd Joint US-European Fluids Engineering Summer Meeting and 8th International Conference on Nanochannels, Microchannels, and Minichannels, FEDSM-ICNMM2010-30300.
Smith, B. A., and Luloff, B. V., 2000, “The Effect of Seat Geometry on Gate Valve Noise,” ASME J. Pressure Vessel Technol., 122, pp. 401–407. [CrossRef]
Elsayed, M., 2013, “Effect of Upstream Edge Geometry on the Trapped Mode Resonance of Ducted Cavities,” Master thesis, McMaster University, Hamilton, Canada.

Figures

Grahic Jump Location
Fig. 1

Geometry of the test section and parameters of the axisymmetric cavity together with the locations of pressure transducers

Grahic Jump Location
Fig. 2

Axial distribution of acoustic pressure decay of the first diametral mode (m = 1) for three cavities of the same length (L/D = 2/12) but different depths (h/D = 1/12, 2/12, 4/12); x is the streamwise distance measured from the cavity center [1]

Grahic Jump Location
Fig. 3

Leading edge suppression techniques: (a) base case with no modification, (b) edge rounding, (c) chamfer, and (d) saw-tooth spoiler

Grahic Jump Location
Fig. 4

Schematic of the saw-tooth spoiler (dimensions are in mm)

Grahic Jump Location
Fig. 5

Dimensions of the curved spoiler (dimensions are in mm)

Grahic Jump Location
Fig. 6

Dimensions and orientation of the delta spoilers (dimensions are in mm)

Grahic Jump Location
Fig. 7

Photographs of (a) curved spoiler and (b) delta spoiler

Grahic Jump Location
Fig. 8

Aeroacoustic response of base case B3 with sharp edges; L/h = 1, h/D = 2/12

Grahic Jump Location
Fig. 9

Effect of the chamfer and rounding-off the edges on the acoustic resonance of base case B3; L/h = 1, h/D = 2/12

Grahic Jump Location
Fig. 10

Acoustic pressure verses reduced velocity showing the effect of chamfer and rounding-off the edges on the acoustic resonance of base case B3; L/h = 1, h/D = 2/12

Grahic Jump Location
Fig. 11

Effects of chamfers on the resonance of base case B4; L/h = 2, h/D = 2/12

Grahic Jump Location
Fig. 12

Effect of chamfer (/L ≈ 0.38) and spoiler 4 on the resonance of base case B5; L/h = 0.5, h/D = 4/12

Grahic Jump Location
Fig. 13

Effect of spoilers 1 and 2 on the resonance of cavity case B3; L/h = 1, h/D = 2/12

Grahic Jump Location
Fig. 14

Effect of spoiler 4 on the resonance of cavity B6; L/h = 1, h/D = 4/12

Grahic Jump Location
Fig. 15

Effect of the curved and delta spoilers on the resonance of cavity B6; L/h = 1, h/D = 4/12

Grahic Jump Location
Fig. 16

Pressure drop as a function of the flow velocity measured across cavity B3 without and with curved and delta spoilers

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In