Being the boundary layer separation control unit which is provided in the boundary layer separation

摘要

PROBLEM TO BE SOLVED: To provide a stable combustor with high thrust and a combustor control method by providing a backward acute-angle protruding matter on the inner wall of an engine, and turning the recirculating flow (counterflow) from the rear backward by this protruding matter to reduce the interference between the recirculating flow and a main boundary layer to suppress the extension of separation region and improving the thrust by the pressure rise in the back surface of the protruding matter.;SOLUTION: A surface A inclined to the downstream side at an angle Θ1 to the main flow is formed in the boundary inter layer (wall surface) that is the subject of separation control and suppression of upstream extension of counterflow region so that the angles of the front and rear walls B and C of a stepped part having the surface A to the main flow are Θ2 and Θ3, respectively. The relation among the angles Θ1, Θ2 and Θ3 is set and controlled to 0°190° and -90°Θ2.;COPYRIGHT: (C)2004,JPO