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Investigations of Multiple Swirl-Venturi Fuel Injector Concepts: Recent Experimental Optical Measurement Results for 1-Point, 7-Point, and 9-Point ConfigurationsThis paper presents results obtained during testing in optically-accessible, JP8-fueled, flame tube combustors using swirl-venturi lean direct injection (LDI) research hardware. The baseline LDI geometry has 9 fuel/air mixers arranged in a 3 x 3 array within a square chamber. 2-D results from this 9-element array are compared to results obtained in a cylindrical combustor using a 7-element array and a single element. In each case, the baseline element size remains the same. The effect of air swirler angle, and element arrangement on the presence of a central recirculation zone are presented. Only the highest swirl number air swirler produced a central recirculation zone for the single element swirl-venturi LDI and the 9-element LDI, but that same swirler did not produce a central recirculation zone for the 7-element LDI, possibly because of strong interactions due to element spacing within the array.
Document ID
Acquisition Source
Glenn Research Center
Document Type
Conference Paper
Hicks, Yolanda R.
(NASA Glenn Research Center Cleveland, OH United States)
Anderson, Robert C.
(NASA Glenn Research Center Cleveland, OH United States)
Tedder, Sarah A.
(NASA Glenn Research Center Cleveland, OH United States)
Tacina, Kathleen M.
(NASA Glenn Research Center Cleveland, OH United States)
Date Acquired
December 2, 2015
Publication Date
October 25, 2015
Subject Category
Aircraft Propulsion And Power
Report/Patent Number
Meeting Information
Meeting: International Symposium on Airbreathing Engines (ISABE)
Location: Phoenix, AZ
Country: United States
Start Date: October 25, 2015
End Date: October 30, 2015
Sponsors: International Society on Air Breathing Engines
Funding Number(s)
WBS: WBS 109492.
Distribution Limits
Work of the US Gov. Public Use Permitted.
gas turbine combustion
laser diagnostics
lean direct injection
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