Phase averaged acoustic measurements for a Mach number 0.6 jetAcoustic phase (ensemble) averaged measurements were performed in a cold, axisymmetric, Mach number 0.6 jet of air. These measurements show that the noise directly radiated by the coherent structure in the jet flow field was responsible for the directivity of the acoustic field. Comparison of phase averaged acoustic spectra with phase averaged radial velocity fluctuations within the jet illustrate the direct link between the two and show that different regions of the jet are responsible for producing the noise measured at various locations in the acoustic field.
Document ID
19850028716
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Morrison, G. L. (Texas A&M University College Station, TX, United States)
Emami, S. (Texas A&M Univ. College Station, TX, United States)