Shock tunnel investigation of boundary-layer transition at M equals 5.5.

摘要: The effects of nose bluntness, angle attack, and boundary-layer cooling on boundarylayer transition an 8° half-angle cone are presented. A small amount bluntness was found to displace the location rearward. Greater amounts produced a blunting reversal in that rearward movement ceased additional forward displacement. maximum displacement from tip about 4.1 times sharp cone. swallowing distance be important correlation parameter. For cone, attack caused move windward meridian with 55% increase at 10° attack. On leeward meridian, moved such for 4° or greater, constant one-third value zero-angle-of-attack case. two blunted cones tested, both meridians. observed as ratio wall-toadiabatic temperature decreased 0.58 0.25.