Prediction of the aerodynamic sound generated due to flow over a cylinder performing combined steady rotation and rotary oscillations

2020 ◽  
Vol 147 (1) ◽  
pp. 325-336 ◽  
Author(s):  
Naveen Ganta ◽  
Bikash Mahato ◽  
Yogesh G. Bhumkar
Keyword(s):  
Aerodynamic Sound ◽  
Steady Rotation

SLOW STEADY ROTATION OF A POROUS SPHERE IN A SPHERICAL CONTAINER

2012 ◽  
Vol 15 (12) ◽  
pp. 1105-1110 ◽  
Author(s):  
D. Srinivasacharya ◽  
M. Krishna Prasad
Keyword(s):  
Porous Sphere ◽  
Steady Rotation ◽  
Spherical Container

Staggered-mesh computation for aerodynamic sound

1998 ◽  
Author(s):  
G. Djambazov ◽  
C.-H. Lai ◽  
K. Pericleous
Keyword(s):  
Aerodynamic Sound

Study on acoustic and flow-induced noise characteristics of L-shaped duct with a shallow cavity

2020 ◽  
Vol 68 (3) ◽  
pp. 209-225
Author(s):  
Masaaki Mori ◽  
Kunihiko Ishihara
Keyword(s):  
Air Conditioning ◽  
Sound Field ◽  
Frequency Range ◽  
Acoustic Characteristics ◽  
Inflow Velocity ◽  
Aerodynamic Sound ◽  
Noise Characteristics ◽  
Flow Induced Noise ◽  
Shallow Cavity ◽  
Conditioning Equipment

An aerodynamic sound generated by a flow inside a duct is one of the noise pro- blems. Flows in ducts with uneven surfaces such as grooves or cavities can be seen in various industrial devices and industrial products such as air-conditioning equipment in various plants or piping products. In this article, we have performed experiments and simulations to clarify acoustic and flow-induced sound characteris- tics of L-shaped duct with a shallow cavity installed. The experiments and simula- tions were performed under several inflow velocity conditions. The results show that the characteristics of the flow-induced sound in the duct are strongly affected by the acoustic characteristics of the duct interior sound field and the location of the shallow cavity. Especially, it was found that the acoustic characteristics were af- fected by the location of the shallow cavity in the frequency range between 1000 Hz and 1700 Hz.

Mitigation of aerodynamic sound for a laminar flow past a square cylinder using a pair of cowl plates

2020 ◽  
Vol 32 (7) ◽  
pp. 076108 ◽  
Author(s):  
Bikash Mahato ◽  
Naveen Ganta ◽  
Yogesh G. Bhumkar
Keyword(s):  
Laminar Flow ◽  
Square Cylinder ◽  
Aerodynamic Sound ◽  
Flow Past

Trailing edge flows and aerodynamic sound

1988 ◽  
Author(s):  
JONATHAN GERSHFELD ◽  
WILLIAM BLAKE ◽  
CHARLES KNISELY
Keyword(s):  
Trailing Edge ◽  
Aerodynamic Sound

Stability of steady rotation of a rotor about its vertical axis on hydrodynamic bearings

1987 ◽  
Vol 23 (12) ◽  
pp. 1189-1195
Author(s):  
N. V. Derendyaev ◽  
V. A. Senyatkin ◽  
V. M. Sandalov
Keyword(s):  
Vertical Axis ◽  
Hydrodynamic Bearings ◽  
Steady Rotation

Shallow water wave generation by unsteady flow

1968 ◽  
Vol 31 (4) ◽  
pp. 779-788 ◽  
Author(s):  
J. E. Ffowcs Williams ◽  
D. L. Hawkings
Keyword(s):  
Shallow Water ◽  
Water Waves ◽  
Water Wave ◽  
Small Amplitude ◽  
Point Of View ◽  
Sound Waves ◽  
Aerodynamic Sound ◽  
Shallow Layer ◽  
Sound Theory ◽  
Water Simulation

Small amplitude waves on a shallow layer of water are studied from the point of view used in aerodynamic sound theory. It is shown that many aspects of the generation and propagation of water waves are similar to those of sound waves in air. Certain differences are also discussed. It is concluded that shallow water simulation can be employed in the study of some aspects of aerodynamically generated sound.

Aerodynamic sound generation of flapping wing

2008 ◽  
Vol 124 (1) ◽  
pp. 72-81 ◽  
Author(s):  
Youngmin Bae ◽  
Young J. Moon
Keyword(s):  
Flapping Wing ◽  
Sound Generation ◽  
Aerodynamic Sound
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