公开(公告)号：JPH06249070A

公开(公告)日：1994-09-06

申请号：JP5466793

申请日：1993-02-22

Applicant: NAT AEROSPACE LAB

Inventor： KARITA TAKESHI ,  MASUTANI GORO ,  ONO FUMIE ,  CHINZEI NOBUO ,  WAKAMATSU YOSHIO ,  SAITO TOSHIHITO ,  TAKAHASHI MASAHIRO

IPC: F02K9/64 ,  F02K7/10

Abstract: PURPOSE:To improve cooling efficiency, reduce flow of cooling medium and restrain engine performance from lowering by film cooling a position exposed to high temperature air current by the use of gas heated to high temperature. CONSTITUTION:Positions exposed to high temperature air current of a ramjet, rocket engine, etc., are film cooled by the use of gas heated to high temperature. For example, regenerative cooling is utilized for a heater 1 in a flow path of liquid hydrogen A. The liquid hydrogen A cools the wall surface of a combustion chamber, while it is heated and gasified to be jetted from a fuel injector 3 into the combustion chamber, mixed and burnt with air from an air intake port for jetting combustion gas C. A portion of high temperature gasified hydrogen is jetted from a film coolant injector 2 along the wall thereof to prevent the combustion gas contact with the wall of the injector and reduce the temperature rise of the wall. The flow of the coolant can be reduced by a simple constitution of disposing thus a heating source in a film coolant flow path.