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Effect of Injector Geometry on Atomization of a Liquid-Liquid Double Swirl Coaxial Injector Using Non-invasive Laser, Optical and X-ray TechniquesThe spray characteristics of a liquid-liquid double swirl coaxial injector were studied using non-invasive optical, laser, and X-ray diagnostics. A parametric study of injector exit geometry demonstrated that spray breakup time, breakup type and sheet stability could be controlled with exit geometry. Phase Doppler interferometry was used to characterize droplet statistics and non-dimensional droplet parameters over a range of inlet conditions and for various fluids allowing for a study on the role of specific fluid properties in atomization. Further, X-ray radiography allowed for investigation of sheet thickness and breakup length to be quantified for different recess exit diameters and inlet pressures. Finally, computed tomography scans revealed that the spray cone was distinctively non-uniform and comprised of several pockets of increased mass flux.
Document ID
20140009923
Acquisition Source
Johnson Space Center
Document Type
Conference Paper
Authors
Radke, C. R.
(Iowa State Univ. Ames, IA, United States)
Meyer, T. R.
(NASA Johnson Space Center Houston, TX, United States)
Date Acquired
July 21, 2014
Publication Date
July 28, 2014
Subject Category
Spacecraft Propulsion And Power
Report/Patent Number
JSC-CN-31422
Meeting Information
Meeting: Joint Propulsion Conference
Location: Cleveland, OH
Country: United States
Start Date: July 28, 2014
End Date: July 30, 2014
Sponsors: American Society of Mechanical Engineers, Society of Automotive Engineers, Inc., American Inst. of Aeronautics and Astronautics, American Society for Electrical Engineers
Distribution Limits
Public
Copyright
Public Use Permitted.
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