Airblast injectors for multipoint injection and methods of assembly
a multi-point injection and airblast technology, applied in the direction of burners, combustion processes, lighting and heating apparatuses, etc., can solve the problems of affecting the performance of the nozzle, prone to flow impreciseness, and intricate or narrow passages can become plugged, so as to improve the swirl
Pending Publication Date: 2014-11-20
COLLINS ENGINE NOZZLES INC
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- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
The invention is a new method of assembling an airblast injector for a fuel distributor. The method involves forming a fluid passage on the internal or external conical surface of a nozzle component and joining the components together to form a fluid circuit. The method can include engaging the components in an interference fit, applying braze or heat to the joint location, or welding the components together. The invention also provides an injector that includes a fuel distributor with a fluid circuit defined between the inner and outer distributor rings, which can be thermally isolated from compressor discharge air. The injector can also include an outer heat shield for thermal isolation of fuel in the fuel distributor and an inner heat shield for thermal isolation of fuel in the fuel distributor from compressor discharge air. The outer heat shield can define an outer air circuit or a converging flow of air to enhance swirl imparted on a flow of compressor discharge air. The technical effects of the invention include improved fuel atomization and reduced emissions.
Problems solved by technology
However, when using traditional brazing techniques, the braze alloy must flow from a ring or pocket to the braze area.
In doing so, it is prone to flow imprecisely when melted.
In some instances intricate or narrow passages can become plugged if too much braze is used.
These fillets and plugs can negatively affect nozzle performance.
The difficulties in controlling braze flow employing traditional brazing techniques is a limiting factor in the design of fuel and air flow passages.
That is, the shape and size of the passages is limited by the ability to control the flow of braze.
Method used
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[0023]Reference will now be made to the drawings wherein like reference numerals identify similar structural features or aspects of the subject invention. For purposes of explanation and illustration, and not limitation, a partial view of an exemplary embodiment of the airblast injectors for multipoint injection in accordance with the invention is shown in FIG. 1 and is designated generally by reference character 100. Other embodiments of the airblast injectors for multipoint injection in accordance with the invention, or aspects thereof, are provided in FIGS. 2-4, as will be described. Airblast injector is adapted and configured for delivering fuel to the combustion chamber of a gas turbine engine.
[0024]Nozzles used in conventional multipoint LDI configurations were pressure atomizing air assist nozzles. The conventional pressure atomizing air assist nozzles were generally inexpensive and light weight. In such conventional LDI configurations, it was found that the air assist nozzle...
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Abstract
A method of assembling an airblast injector includes forming a fluid passage on an internal conical surface of a first nozzle component and / or on an outer conical surface of a second nozzle component configured and adapted to mate with the first nozzle component to form at least a portion of a fluid circuit therebetween. The fluid passage is configured and adapted to provide passage for fluid in the fluid circuit between the first and second nozzle components. The method also includes joining the first and second nozzle components together by engaging the second nozzle component within the first nozzle component.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims priority to U.S. Provisional Patent Application No. 61 / 555,363 filed Nov. 3, 2011 which is incorporated by reference herein in its entirety.STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT[0002]This invention was made with government support under contract number NNC11CA15C awarded by NASA. The government has certain rights in the invention.BACKGROUND OF THE INVENTION[0003]1. Field of the Invention[0004]The present invention relates to airblast injection nozzles, and more particularly, to systems and methods for assembling components of airblast injection nozzles for multipoint injection.[0005]2. Description of Related Art[0006]Multipoint lean direct injection (LDI) for gas turbine engines is well known in the art. Multipoint refers to the use of a large number of small airblast injector nozzles to introduce the fuel and air into the combustor. By using many very small airblast injector nozzles there...
Claims
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Login to View More IPC IPC(8): F23D11/10F23R3/16
CPCF23D11/107F23R3/16F23D2900/11101F23R3/28Y10T29/49432
Inventor PROCIW, LEV ALEXANDER
Owner COLLINS ENGINE NOZZLES INC