Abstract
Geometrically similar ramjet-type combustion chambers of 1.61, 4.026, and 6.065-inch diameter and lengths of 5.25D and 4.25D were operated at Reynolds numbers ranging from 24,000 to 230,000 and ambient pressure levels from 0.2 to 1.5 atmospheres, with propane fuel. Flameholders were annular V-gutters having a leading-edge included angle of 30° and producing 44% blockage of the combustor cross section. Excepting the wall thickness of some burners, all dimensions of burners, flameholders, upstream piping and mixing sections were scaled in proportion to burner inside diameters.
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