Structure and propagation of supersonic singularities from helicoidal sourcesAn asymptotic analysis of the acoustic field radiated by a supersonic helicoidal line source distribution is given. The asymptotic results are valid in the vicinity of the Mach surfaces associated with the moving sources. Particular attention is paid to the singular nature of the field on the Mach surfaces, which the analysis describes exactly. In addition, it is found that the asymptotic approximation predicts numerical values of the pressure with considerable accuracy. Some details on the field of a single source are derived as a special case.
Document ID
19880029311
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Myers, M. K. (Joint Institute for Advancement of Flight Sciences Hampton, VA, United States)
Farassat, F. (NASA Langley Research Center Hampton, VA, United States)