The Navy has been investigating techniques to reduce jet engine noise during ground run-up testing. The objective of this program is to continue the development of the Coanda/Refraction concept, investigated during the exploratory contracts, to attenuate the noise generated in the exhaust of turbojet/turbofan aircraft engines during ground run-up testing. Full scale design, fabrication and testing will be accomplished using the Coanda concept to validate the results obtained during the exploratory model studies and provide accurate noise reduction data. Concurrent with the full scale activity, additional model studies will also be conducted to evaluate the Coanda concept and its applicability to engines installed in airframes. This document defines the detail plan that will be followed to accomplish the overall plan. (Author)
Navy Coanda/Refraction Ground Noise Suppressor Program Plan
1974
86 pages
Report
No indication
English
Acoustics , Laboratory & Test Facility Design & Operation , Jet & Gas Turbine Engines , Jet engine noise , Noise reduction , Test facilities , Ground level , Jet engine exhaust , Deflection , Pipe bends , Acoustic refraction , Coanda effect , Suppressors , Acoustic absorption , Acoustic attenuation , Model tests , Ground runup tests
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