Measurements of Supersonic Helium/Air Mixture Jets

An enhanced method of using helium/air mixture jets to simulate the aeroacoustic properties of hot jets is presented. By using helium to reduce the jet density and to increase the jet acoustic speed, unheated nominal Mach 1.5 jets are tested that have jet-to-ambient density and acoustic speed ratios...

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Veröffentlicht in:	AIAA journal 1999-11, Vol.37 (11), p.1363-1369
Hauptverfasser:	Kinzie, Kevin W, McLaughlin, Dennis K
Format:	Artikel
Sprache:	eng
Schlagworte:	Acoustics Aeroacoustics and atmospheric sound Aeroacoustics, atmospheric sound Aircraft Compressible flows shock and detonation phenomena Exact sciences and technology Flow measurement Fluid dynamics Fundamental areas of phenomenology (including applications) Jets Noise Physics Reynolds number Simulation Supersonic and hypersonic flows Supersonic flow Turbines Turbulent flows, convection, and heat transfer
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Beschreibung
Zusammenfassung:	An enhanced method of using helium/air mixture jets to simulate the aeroacoustic properties of hot jets is presented. By using helium to reduce the jet density and to increase the jet acoustic speed, unheated nominal Mach 1.5 jets are tested that have jet-to-ambient density and acoustic speed ratios that approximately match those from a hot jet with a jet-to-ambient static temperature ratio of 1.2.
ISSN:	0001-1452 1533-385X
DOI:	10.2514/2.634