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Volume 5,     Number 2,     Spring 1997

 

AERODYNAMIC SOUND DUE TO A
GAUSSIAN PULSE NEAR AN ABSORBING
HALF-PLANE IN A MOVING FLUID
S. ASGHAR, TASAWAR HAYAT AND M. AYUB

Abstract. The scattering of a Gaussian pulse due to a linear source near an absorbing half plane introducing Kutta- Joukowski condition (wake condition) is studied. The total field for the leading edge (no wake present) and the trailing edge (wake present) situations is calculated using spatial and temporal Fourier transforms. It is found that the field produced by the Kutta-Joukowski condition will be substantially in excess of that in its absence when the source is near the edge. Remarkably, Gaussian pulses provide a method to evaluate the diffracted far field for any transient line source.

 

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