BOUNDARY LAYER SEPARATION CONTROL DEVICE, FUEL INJECTOR, AND CONTROL METHOD

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 angleΘ1 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 areΘ2 andΘ3, respectively. The relation among the anglesΘ1,Θ2 andΘ3 is set and controlled to 0°<1<90°and -90°<Θ2. COPYRIGHT: (C)2004,JPO