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Twin JetMany subsonic and supersonic vehicles in the current fleet have multiple engines mounted near one another. Some future vehicle concepts may use innovative propulsion systems such as distributed propulsion which will result in multiple jets mounted in close proximity. Engine configurations with multiple jets have the ability to exploit jet-by-jet shielding which may significantly reduce noise. Jet-by-jet shielding is the ability of one jet to shield noise that is emitted by another jet. The sensitivity of jet-by-jet shielding to jet spacing and simulated flight stream Mach number are not well understood. The current experiment investigates the impact of jet spacing, jet operating condition, and flight stream Mach number on the noise radiated from subsonic and supersonic twin jets.
Document ID
20100042248
Acquisition Source
Glenn Research Center
Document Type
Presentation
Authors
Henderson, Brenda (NASA Glenn Research Center Cleveland, OH, United States)
Bozak, Rick (NASA Glenn Research Center Cleveland, OH, United States)
Date Acquired
August 25, 2013
Publication Date
May 1, 2010
Subject Category
Aircraft Propulsion And Power
Report/Patent Number
E-17585
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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