NDLI: Experimental investigation of crossflow jet mixing in a rectangular duct

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Experimental investigation of crossflow jet mixing in a rectangular duct

Content Provider	NASA Technical Reports Server (NTRS)
Author	Liscinsky, D. S. True, B. Holdeman, J. D.
Copyright Year	1993
Description	An experimental investigation of the mixing of nonreacting opposed rows of jets injected normal to a confined rectangular crossflow has been conducted. Planar Mie-scattering was used to measure the time-average concentration distribution of the jet fluid in planes perpendicular to the duct axis. The mixing effectiveness of round orifice injectors was measured as a function of orifice spacing and orifice diameter. Mixing effectiveness was determined using a spatial unmixedness parameter based on the variance of mean jet concentration distributions. Optimum mixing was obtained when the spacing-to-duct height ratio was inversely proportional to the square root of the jet-to-mainstream momentum-flux ratio. For opposed rows of round holes with centerlines inline, mixing was similar for blockages up to 75 percent. Lower levels of unmixedness were obtained as a function of downstream location when axial injection length was minimized. Mixing may be enhanced if orifice centerlines of opposed rows are staggered, but note that blockage must be less than 50 percent for this configuration.
File Size	5555007
Page Count	14
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19930017837
Archival Resource Key	ark:/13960/t8hf2rn5x
Language	English
Publisher Date	1993-06-01
Access Restriction	Open
Subject Keyword	Aircraft Propulsion And Power Ducted Flow Confinement Jet Mixing Flow Gas Turbines Injectors Fluid Jets Orifices Spacing Combustion Chambers Cross Flow Holes Mechanics Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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