Advanced SearchSearch Tips
Effect of the Shape of a Guide Grill Above a Resonance Type Sound Absorbing Panel on Intake Flow into a Resonator
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
Effect of the Shape of a Guide Grill Above a Resonance Type Sound Absorbing Panel on Intake Flow into a Resonator
Bae, Hyunwoo; Sung, Jaeyoung; Lee, Dong Hoon;
  PDF(new window)
This study investigates cavity flows through a guide grill above a resonator. Vortex distributions and intake flows are simulated for various shapes of the guide grill. The flows are assumed to be compressible, unsteady, and turbulent. Numerical simulations are conducted using a large eddy simulation (LES) model. To analyze the effect of the guide grill shape, three cavity lengths (0.2H, 0.6H, and 1.0H) and cavity angles (, and ) are considered based on resonator height (H). The results show that the vortex generated in the resonator by cavity flow increases with cavity length. Thus, the intake flow is minimum at the smallest cavity length and angle. However, when cavity length is equal to resonator height, the intake flow decreases. The maximum intake flow occurs at a cavity angle at higher cavity lengths owing to the interaction between the vortex in the resonator and intake flow.
Guide grill;Cavity flow;LES model;Intake flow;Resonator;Sound absorbing panel;
 Cited by
National Statistical Office, viewed 2015, Annual report on the amount of urban railway transportation, .

Choi, J. K., Lee, J. W., Chang, I. S., 2001, A Study on Squeal Noise Control by Absorption Treatment in Urban Rail Transit System, T. KSNVE, 11:4 58-64.

Lee, I. M., Choi, S. S., Park, B., 1994, Prediction and Control of Noise and Vibration in Building From Underground Rail Systems, J. KSRM, 4:2 77-86.

Oh, Y. K., Kim, H. G., Lee, W., Y., 2004, Evaluation and Prediction of the Characteristics of Noise Reduction Depending on the Shapes of the Tunnel Section, JAIK, 20:8 177-84.

Raghunathan, R. S., Kim, H. D., Setoguchi, T., 2002, Aerodynamics of High-speed Railway Train, Progress in Aerospace Science, 38:6-7 469-514. crossref(new window)

Jang, K. S., Yoon, J. W., Kim, Y. C., Kim, D. H., 2001, The Study of the Experimental Evaluation for the Interference Device on the Noise Barrier Edge, KSNVE, 1 844-848.

Howe, M. S., 2004, Mechanism of Sound Generation by Low Mach Number Flow over a Wall Cavity, JSV 273:1-2 103-123. crossref(new window)

Alvarez, J. O., Kerschen, E. J., Tumin, A., 2004, A Theoretical Model of Cavity Acoustic Resonance in Subsonic Flow, AIAA J. 2004-2845.

Erturk, E., Gokcol, O., 2007, Fine Grid Numerical Solutions of Triangular Cavity Flow, EPJ. Appl. Phy., 38:1 97-105. crossref(new window)

Demirdzic, I., Lileka, Z., Peric, M., 1992, Fluid Flow And Heat Transfer Test Problems For Non-orthogonal Grids: Bench-mark Solutions, IJNM, 15 329-354.