Three-dimensional computations of the impulsive wave discharged from a duct |
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Authors: | Young-Ki Lee Yong-Hun Kweon Heiiy-Dong Kim Toshiaki Setoguchi |
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Affiliation: | 1. School of Mechanical Engineering, Andong National University, 388 Songcheon-dong, 760-749, A ndong, Korea 2. Department of Energy and Environmental Engineering, Kyushu University, 6-1, Kasugakouen, 816-8580, Kasuga, Fukuoka, Japan 3. Department of Mechanical Engineering, Saga University, 1, Honjo-machi, 840-8502, Saga, Japan
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Abstract: | A sudden discharge of mass flow from the exit of a duct can generate an impulsive wave, generally leading to undesirable noise
and vibration problems The present study develops an understanding of unsteady flow physics with regard to the impulsive wave
discharged from a duct, using a numerical method A second order total variation diminishing scheme ts employed to solve three-dimensional,
unsteady, compressible Euler equations Computations are performed for several exit conditions with and without ground and
wall effects under a change in the Mach number of an initial shock wave from 11 to 15 The results obtained show that the directivity
and magnitude of the impulsive wave discharged from the duct are significantly influenced by the initial shock Mach number
and by the presence of the ground and walls |
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Keywords: | |
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