公开(公告)号：JPH02211333A

公开(公告)日：1990-08-22

申请号：JP2767089

申请日：1989-02-08

Applicant: NAT AEROSPACE LAB ,  ISHIKAWAJIMA HARIMA HEAVY IND

Inventor： CHINZEI NOBUO ,  MASUTANI GORO ,  KOMURO TOMOYUKI ,  KUDO KENJI ,  MURAKAMI JUNRO ,  TANI KOICHIRO ,  WAKAMATSU YOSHIO ,  KARITA TAKESHI ,  SATO YUKINORI ,  SAYAMA MASAMI ,  OWAKI KATSURA ,  TSUCHIYA KAZUYUKI

IPC: F02P23/04 ,  F02C7/264 ,  F02K7/14 ,  F02K9/95

Abstract: PURPOSE:To enable a combustion promoting effect to be as high as possible by constituting a plasma jet ignition system of an ignition nozzle body, a working fluid supply means, an arc generating electrode and a plasma accelerating means. CONSTITUTION:Working fluid containing supplied oxygen is set to the plasma state by an arc generating electrode 8 of an ignition nozzle body 6 and accelerated sufficiently by a plasma accelerating means 9 to be jetted deeply into a combustor 1. This jetted plasma injection promotes the combustion of burnt fluid flowing in the combustor with supersonic speed by the thermal and kinetic energy and chemical reaction promoting effect along with active group generation to enable ignition. Also, since the working fluid provides plasma by the arc generating electrode 8 having a negative metal electrode 12 for promoting the formation of a high melting point oxidized film, the negative electrode 12, when the working fluid containing oxygen is used, promotes the formation of the high melting point protective oxidized film on the surface without being damaged by the arc so that stable plasma jet can be injected for a long time.

公开(公告)号：JPH03258958A

公开(公告)日：1991-11-19

申请号：JP5417390

申请日：1990-03-06

Applicant: NAT AEROSPACE LAB

Inventor： KUDO KENJI ,  MURAKAMI JUNRO ,  KOMURO TOMOYUKI ,  TANIKOU ICHIROU ,  MASUTANI GORO ,  CHINZEI NOBUO ,  WAKAMATSU YOSHIO ,  KARITA TAKESHI

IPC: F02K7/14 ,  F02C9/28

Abstract: PURPOSE:To maintain the efficient working condition over a wide range of the number of mat without a complex mechanism and a control circuit by mixing the combustion inhibitor and the combustion accelerator in the fuel for scram jet, and adjusting a mixing quantity of the both to control the progress of the combustion in a scram jet combustor, and controlling the working condition. CONSTITUTION:The combustion inhibitor 4 and/or the combustion accelerator 5 are mixed in the fuel 2 for scram jet, and a mixing quantity of the both is adjusted to control the progress of the combustion in a scram jet combustor 1, and the working condition is controlled with control valves 6 - 8. At this stage, halone, carbon dioxide, alkali metal compound powder and water or the like is used as the combustion inhibitor 4, and silane, alkyl aluminium and hydrazine or the like is used as the combustion accelerator 5.

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.

公开(公告)号：JPH03255329A

公开(公告)日：1991-11-14

申请号：JP5417490

申请日：1990-03-06

Applicant: NAT AEROSPACE LAB

Inventor： MURAKAMI JUNRO ,  KOMURO TOMOYUKI ,  KUDO KENJI ,  TANI KOICHIRO ,  MASUTANI GORO ,  CHINZEI NOBUO ,  WAKAMATSU YOSHIO ,  KARITA TAKESHI

IPC: G01M9/04

Abstract: PURPOSE:To change the cross sectional area of a diffuser throat autonomously by moving the wall surfaces of the diffuser in response to the difference in pressure distributions in the vicinity of the diffuser throat before and after the diffuser throat. CONSTITUTION:First movable walls 2 and 2 are provided on a diffuser throat 4 in a diffuser (a). Second movable walls 3 and 3 constituting the throat 4 are provided at the downstream side of the walls 2 and 2. The throat 4 is kept at a specified interval with a spring system which is set in response to the inner pressure at the upstream side of the throat 4 before starting of the diffuser. When the steady-state operating state is obtained after the starting and the inner pressure at the upstream side of the throat 4 is decreased, the movable walls 2 and 2 are pushed inward with the spring system by the amount corresponding to the decreased amount of the inner pressure. The tips of the movable walls 3 and 3 are also pushed in response and moved inward. Thus, the cross sectional area of the throat 4 is decreased. Therefore, the throat 4 is expanded before the starting and contracted after the starting autonomously.

公开(公告)号：JPH03246355A

公开(公告)日：1991-11-01

申请号：JP4350790

申请日：1990-02-23

Applicant: NAT AEROSPACE LAB

Inventor： MASUTANI GORO ,  KOMURO TOMOYUKI ,  MURAKAMI JUNRO ,  KUDO KENJI ,  TANI KOICHIRO ,  CHINZEI NOBUO ,  WAKAMATSU YOSHIO ,  KARITA TAKESHI

IPC: F02K7/14

Abstract: PURPOSE:To ignite the fuel jets from plural wall surfaces by a single ignitor and to reduce the number of ignitors, by forming a recirculating area of the fuel including a fuel mixture gas to be jetted from numerous fuel jet orifices in a scrum jet combustor, from plural wall surfaces. CONSTITUTION:In a combustion chamber in which wall surfaces 1 and 2 are crossed at 90 deg., backward steps 3 are formed to the wall surfaces, and plural pilot fuel fet orifices 5 are formed on the wall surface 1 at the upper stream side of steps 3, while an ignitor 6 is provided near the step 3 at the downstream side of the step. And plural main fuel jet orifices 7 are formed on the wall surface 2 at the downstream side of the step. As a result, a low speed recirculating area including a fuel mixture gas with a density suitable to circulate flames 4 along the wall surface of the combustion chamber can be formed, the fuel jets from the wall surfaces 1 and 2 can be ignited by the single ignitor 6, and the number of ignitors can be reduced.

公开(公告)号：JPH0579933B2

公开(公告)日：1993-11-05

申请号：JP5417490

申请日：1990-03-06

Applicant: NAT AEROSPACE LAB

Inventor： MURAKAMI JUNRO ,  KOMURO TOMOYUKI ,  KUDO KENJI ,  TANI KOICHIRO ,  MASUTANI GORO ,  CHINZEI NOBUO ,  WAKAMATSU YOSHIO ,  KARITA TAKESHI

IPC: G01M9/04