Self-Excited Superturbulence: The Whistler Nozzle
GRUMMAN AEROSPACE CORP BETHPAGE NY RESEARCH DEPT
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The whistler nozzle, consists of a convergent nozzle section, a constant area section, and a step change to an exit section with a larger constant area. The exit section excites a standing acoustic wave in the constant area section, in a way similar to the action of an organ pipe. The result of this resonance is a loud pure tone and a greatly increased rate of jet mixing. The report contains detailed experimental results for the configurations tested. It includes a discussion of several possible applications and suggestions for future experiments aimed at increasing our understanding and improving the performance of the whistler nozzle. Also included is a discussion of the relationship between the vortex nature of subsonic turbulent mixing layers and the differences in turbulent mixing rates for subsonic and supersonic flows.
- Fluid Mechanics
- Jet and Gas Turbine Engines