Boundary-layer transition on an open-nose cone

Paul F. Brinich
naca-tn-4214
Feb 1958


Comparison of transition locations for an open-nose cone, a conventional sharp cone, and a hollow cylinder showed that transition locations on the open-nose cone and the hollow cylinder were identical but differed greatly from those on the sharp cone. This is believed to be caused by the essentially two-dimensional character of the boundary layer at the leading edge of the open-nose cone. Bluntness effects on the open-nose cone were quite similar to those observed on the hollow cylinder. Transition was displaced downstream 2.2 times the sharp-cone transition distance by blunting the tip.

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