Effects of geometric and flow-field variables on inverted-velocity-profile coaxial jet noise and source distributions

Stone, James R.; Goodykoontz, J. H.; Gutierrez, O. A.

doi:10.2514/6.1979-635

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1979

1984

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Cited by 8 publications

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“…The locations of the microphones were selected to accommodate other acoustic test programs (ref. 6). The ground plane of the test area was composed of asphalt interspersed with patches of concrete ( fig.…”

Section: Apparatus and Procedurementioning

confidence: 99%

Experimental study of coaxial nozzle exhaust noise

Goodykoontz

Stone

1979

5th Aeroacoustics Conference

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Experimental results are presented for static acoustic model tests of various geometrical configurations of coaxial nozzles operating over a range of flow conditions. The geometrical configurations consisted of nozzles with coplanar and non-coplanar exit planes and various exhaust area ratios. Primary and secondary nozzle flows were varied independently over a range of nozzle pressure ratios from 1.4 to 3.0 and gas temperatures from 280 to 1100 K. Acoustic data are presented for the conventional mode of coaxial nozzle operation as well as for the inverted velocity profile mode. Comparisons are presented to show the effect of configuration and flow changes on the acoustic characteristics of the W nozzles.

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Section: Apparatus and Procedurementioning

confidence: 99%