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Evaluation of the in-flight noise signature of a 32-chute suppressor nozzle: Acoustic data report (1977)

Moore, M. T. ; Doyle, V. L.

In: CASI

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Publication Date: 2019-06-27

Description: Outdoor static and 40 x 80 FT wind tunnel tests of the J79-15 engine/nacelle system with the conic nozzle and 32-chute exhaust suppressor were conducted to acquire the data necessary to evaluate the simulated in-flight signature of an engine-size 32-chute exhaust nozzle suppressor using the 40 x 80 ft wind tunnel and to study possible engine core noise contamination of the jet signature. The tests are described and and a sampling of the data acquired is presented. Included are aero performance summaries, as-measured and composite 1/3 OBSPL spectra for the 70 ft sideline high and low mics from the outdoor static tests, sideline traverse spectra and internal noise measurements from both the outdoor static and the 40 x 80 ft wind tunnel tests.

Keywords: ACOUSTICS

Type: NASA-CR-152076

Format: application/pdf

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