In this study, experiments were performed to investigate the influence of jet density in the generation of noise from inverted velocity profile subsonic jets. Such jets consist of low-speed gas flow in the center and a higher-speed annular flow. A combination of helium, nitrogen, and argon gases at various flow velocities were expanded through center and through annular convergent nozzles to obtain the desired density effects. Shadowgraphs of the jet flow were obtained, and mean velocity profiles and radiated noise were measured. The results clearly show that a difference in density between the inner and outer flows is an important factor in the development of the jet flow and in the production of jet noise. (Posamentier)
Effect of density on noise radiated from inverted velocity profile jets
Wirkung der Dichte auf die Schallausbreitung bei Strahlen mit umgekehrtem Geschwindigkeitsprofil
AIAA-Papers ; 1-8
1979
8 Seiten, 10 Bilder, 15 Quellen
Conference paper
English
Effect of density on noise radiation from subsonic inverted velocity profile jets
Tema Archive | 1980
|Noise from supersonic coaxial jets, part 3: Inverted velocity profile
Tema Archive | 1997
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