Apparatus and method for fuel-air mixing before supply of low pressure lean pre-mix to combustor for rotating ramjet engine driving a shaft
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F02C-003/14
출원번호
US-0376159
(1999-08-17)
발명자
/ 주소
Lawlor Shawn P.
출원인 / 주소
Ramgen Power Systems, Inc.
대리인 / 주소
Goodloe, Jr.
인용정보
피인용 횟수 :
16인용 특허 :
12
초록▼
Fuel air mixing apparatus, and a method for design and operation of fuel-air mixing apparatus. An axial inlet air fan provides inlet air to an annular passageway having therein fuel supply structures through which fuel such as low pressure natural gas is injected. Vortex generators on the fuel suppl
Fuel air mixing apparatus, and a method for design and operation of fuel-air mixing apparatus. An axial inlet air fan provides inlet air to an annular passageway having therein fuel supply structures through which fuel such as low pressure natural gas is injected. Vortex generators on the fuel supply structures create vortices to mix the inlet air with the injected fuel. Mixing is provided according to a pre-selected formula to control the ratio of transverse momentum to axial momentum, to thoroughly mix the fuel and the air, so as to provide a uniformly mixed inlet gas stream. This stream is fed to an unshrouded ramjet inlet which captures and compresses the mixed inlet gas stream by utilizing inlet structures and an adjacent housing sidewall structure. Fuel is oxidized in the combustion chamber(s) to produce expanding combustion gases. Such gases escape out through a ramjet nozzle, acting against outlet structures and an adjacent housing sidewall, rotating the ramjet at supersonic velocities, and producing shaft energy. Efficient mixing of the oxidant and fuel prior to entry into the ramjet combustor, and the short residence times in the combustion chamber, minimize the formation of undesirable oxides of nitrogen.
대표청구항▼
[ What is claimed is:] [1.]1. A fuel-air pre-mix apparatus for a rotating ramjet engine assembly driving a shaft, said apparatus comprising:(a) a gas flow path housing having a relatively narrow, substantially annular outlet, said gas flow path housing having a longitudinal axis, said gas flow path
[ What is claimed is:] [1.]1. A fuel-air pre-mix apparatus for a rotating ramjet engine assembly driving a shaft, said apparatus comprising:(a) a gas flow path housing having a relatively narrow, substantially annular outlet, said gas flow path housing having a longitudinal axis, said gas flow path housing defined by(i) an upstream housing end,(ii) a downstream housing end,(iii) an inner wall having an outer surface,(iv) an outer wall having an inner surface(v) said gas flow path housing convergent, at least in part, from said upstream end to said downstream end;(b) a plurality of low aerodynamic drag fuel supply structures disposed in said gas flow path housing, said fuel supply structures comprising a fuel inlet and a fuel injection outlet;(c) a plurality of vortex generators fixedly mounted within said gas flow path housing, and in proximity to said fuel injection outlets, said vortex generators mounted to protrude into said gas flow path housing and positioned so as to deflect a portion of said inlet carrier gas thus forming axially rotating vortices and thereby convert a portion of the axial momentum of said inlet carrier gas to transverse momentum, to thereby create mixing between said inlet carrier gas and said fuel,(d) said gas flow path housing thus receiving (A) a low pressure inlet carrier gas for carriage of an oxidant, and (B) fuel, and (C) within said gas flow path housing, mixing said fuel and said oxidant to produce a low pressure fuel-oxidant mixture for said rotating-ramjet engine assembly.
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이 특허에 인용된 특허 (12)
Sattelmayer Thomas (Mandach CHX), Combustion chamber for gas turbine engine.
Ansart Denis R. H. (Bois le Roi FRX) Maunand Jacques L. M. (St. Forget FRX), Fuel injection system for a gas turbine combustor including radial fuel spray arms and V-gutter flameholders.
Lee Ching-Pang (Cincinnati OH) Venkataramani Kattalaicheri S. (Westchester OH) Lahti Daniel J. (Cincinnati OH) Lee Vincent H. (Jupiter FL), Hypersonic scramjet engine fuel injector.
Toon, Ian J.; O'Dell, Stephen J.; Currin, John H.; Willis, Jeffrey D., Staged gas turbine combustion chamber with counter swirling arrays of radial vanes having interjacent fuel injection.
Steele, Robert C.; Edmonds, Ryan G.; Williams, Joseph T.; Baldwin, Stephen P., Vortex combustor for low NOX emissions when burning lean premixed high hydrogen content fuel.
Steele, Robert C.; Edmonds, Ryan G.; Williams, Joseph T.; Baldwin, Stephen P., Vortex combustor for low NOx emissions when burning lean premixed high hydrogen content fuel.
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