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Supersonic Pulsed InjectionAn injector has been developed to provide high-speed high-frequency (order 10 kHz) pulsed a supersonic crossflow. The injector nozzle is formed between the fixed internal surface of the nozzle and a freely rotating three- or four-sided wheel embedded within the device. Flow-induced rotation of the wheel causes the nozzle throat to open and close at a frequency proportional to the speed of sound of the injected gas. Measurements of frequency and mass flow rate as a function of supply pressure are discussed for various injector designs. Preliminary results are presented for wall-normal injection of helium into a Mach-2 ducted airflow. The data include schlieren images in the injectant plume in a plane normal to the flow, downstream of injection.
Document ID
20010010365
Acquisition Source
Langley Research Center
Document Type
Preprint (Draft being sent to journal)
Authors
Cutler, A. D. (George Washington Univ. Hampton, VA United States)
Harding, G. C. (George Washington Univ. Hampton, VA United States)
Diskin, G. S. (NASA Langley Research Center Hampton, VA United States)
Date Acquired
September 7, 2013
Publication Date
January 1, 2001
Subject Category
Fluid Mechanics And Thermodynamics
Report/Patent Number
AIAA Paper 2001-0517
Report Number: AIAA Paper 2001-0517
Meeting Information
Meeting: Aerospace Sciences
Location: Reno, NV
Country: United States
Start Date: January 8, 2001
End Date: January 11, 2001
Sponsors: American Inst. of Aeronautics and Astronautics
Funding Number(s)
CONTRACT_GRANT: NCC1-370
Distribution Limits
Public
Copyright
Public Use Permitted.

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