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In order to get detailed information of noise generation from a pulsatile jet discharged from the end of a pipe, the flow field through the pipe and the flow field downstream of the pipe end were numerically and experimentally simulated. A shock wave is discharged into the atmosphere and subsequently, a vortex ring and an underexpanded jet form and diffuse. The results obtained by calculation were...
A pulsating flow through a pipe and the discharged jet from the pipe were experimentally studied. The pressure histories along the pipe and the noise emanating from the pipe end were measured. The flow pattern downstream of the pipe end was experimentally visualized and the mechanism of the noise generation was examined. Weak pressure waves which follow the discharged shock from the pipe were found...
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