Experimental study of isothermal wake-flow characteristics of various flame-holder shapes

David S. Gabriel, George G. Younger, William R. Mickelsen
naca-rm-e51k07
Jan 1952


An investigation of the effects of flame-holder-shape changes on the strength and the shedding frequency of the Karman vortices was conducted in isothermal flow. Because the characteristics of the stable vortex trail are related to the recirculation zones which influence the combustion process, these results may furnish a basis of correlation of combustion efficiency and stability in combustion studies. Appreciable changes in strength and frequency were obtained by varying flame-holder shape. Changing shape and size provides many schedules of variation of strength and frequency not obtainable by changing size only and may provide theoretical maximum strength for a given frequency.

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