Stevenson, SC
Christan Xavier Stevenson, Inman, SC US
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20140238041 | COMBUSTOR CAN TEMPERATURE CONTROL SYSTEM - The present application provides a fuel delivery system for a combustor with reduced coherence and/or reduced combustion dynamics. The combustor can assembly may include a first manifold for delivering a first flow of fuel to a first set of fuel injectors and a second manifold for delivering a second flow of fuel to a second set of fuel injectors. The first flow of fuel may have a first temperature and the second flow of fuel may have a second temperature. The first temperature may be higher than the second temperature. | 08-28-2014 |
Christian Stevenson, Greenville, SC US
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20110073684 | INTERNAL BAFFLING FOR FUEL INJECTOR - A fuel injector includes a fuel delivery tube; a plurality of pre-mixing tubes, each pre-mixing tube comprising at least one fuel injection hole; an upstream tube support plate that supports upstream ends of the plurality of pre-mixing tubes; a downstream tube support plate that supports downstream ends of the plurality of pre-mixing tubes; an outer wall connecting the upstream tube support plate and the downstream tube support plate and defining a plenum therewith; and a baffle provided in the plenum. The baffle includes a radial portion. A fuel delivered in the upstream direction by the fuel delivery tube is directed radially outwardly in the plenum between the radial portion of the baffle and the downstream tube support plate, then in the downstream direction around an outer edge portion of the radial portion, and then radially inwardly between the radial portion and the upstream tube support plate. | 03-31-2011 |
Christian Stevenson, Inman, SC US
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20100095676 | Multiple Tube Premixing Device - The present application provides a premixer for a combustor. The premixer may include a fuel plenum with a number of fuel tubes and a burner tube with a number of air tubes. The fuel tubes extend about the air tubes. | 04-22-2010 |
20110000215 | Combustor Can Flow Conditioner - The present application provides a combustor for a gas turbine engine. The combustor may include a combustor can with a number of nozzles therein and a flow conditioner positioned around the combustor can. The flow conditioner may include a number of apertures therein. | 01-06-2011 |
20130067926 | Multiple Tube Premixing Device - The present application provides a premixer for a combustor. The premixer may include a fuel plenum with a number of fuel tubes and a burner tube with a number of air tubes. The fuel tubes extend about the air tubes. | 03-21-2013 |
Christian X. Stevenson, Inman, SC US
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20100162711 | DLN DUAL FUEL PRIMARY NOZZLE - The primary nozzles of a Dry Low NOx (DLN) combustor are configured to alternatively burn a first gas fuel or a second gas fuel, where the two gas fuels may have widely disparate energy content. Natural gas may be the first gas fuel and syngas may be the second gas fuel. An inner fuel circuit and an outer fuel circuit are provided to allow effective control of fuel/air mixing profiles, dynamics, primary pre-ignition and emission control by changing the fuel split between the two fuel circuits. The inner fuel circuit may be run in a diffusion combustion mode on many gas fuels. | 07-01-2010 |
Christian X. Stevenson, Greenville, SC US
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20090249789 | BURNER TUBE PREMIXER AND METHOD FOR MIXING AIR AND GAS IN A GAS TURBINE ENGINE - A burner for use in a gas turbine engine includes a burner tube having an inlet end and an outlet end; a plurality of slots formed in the burner tube and configured to introduce air flows tangentially into the burner tube and impart swirl to the air flows; a plurality of fuel passages extending axially along the burner tube; and a plurality of fuel injection holes provided to each fuel passage. At least one of the fuel injection holes of each fuel passage is configured to inject a fuel flow tangentially into the burner tube between air flows of adjacent slots to form a fuel and air co-flow. A method of mixing air and fuel in a burner of a gas turbine is provided. The burner includes a burner tube including a plurality of slots formed in the burner tube. The method includes introducing air flows tangentially into the burner tube through the slots and imparting swirl to the air flows; and injecting fuel between air flows of adjacent slots to form fuel and air co-flows. This eliminates jet cross flow, which tends to cause flame holding. The tangentially entered fuel and air co-flow layers then flow down axially with quick mixing and dump to a combustor for a stable premixed combustion. | 10-08-2009 |
Christian Xavier Stevenson, Greenville, SC US
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20100263383 | GAS TURBINE PREMIXER WITH INTERNAL COOLING - A system that includes a turbine fuel nozzle comprising an air-fuel premixer. The air-fuel premixed includes a swirl vane configured to swirl fuel and air in a downstream direction, wherein the swirl vane comprises an internal coolant path from a downstream end portion in an upstream direction through a substantial length of the swirl vane. | 10-21-2010 |
20110057056 | MONOLITHIC FUEL INJECTOR AND RELATED MANUFACTURING METHOD - A monolithic fuel injection head for a fuel nozzle includes a substantially hollow vesicle body formed with an upstream end face, a downstream end face and a peripheral wall extending therebetween, an internal baffle plate extending radially outwardly from a downstream end of the bore, terminating short of the peripheral wall, thereby defining upstream and downstream fuel plenums in the vesicle body, in fluid communication by way of a radial gap between the baffle plate and the peripheral wall. A plurality of integral pre-mix tubes extend axially through the upstream and downstream fuel plenums in the vesicle body and through the baffle plate, with at least one fuel injection hole extending between each of the pre-mix tubes and the upstream fuel plenum, thereby enabling fuel in the upstream plenum to be injected into the plurality of pre-mix tubes. The fuel injection head is formed by direct metal laser sintering. | 03-10-2011 |
20120011854 | FLAME TOLERANT SECONDARY FUEL NOZZLE - A combustor for a gas turbine engine includes a plurality of primary nozzles configured to diffuse or premix fuel into an air flow through the combustor; and a secondary nozzle configured to premix fuel with the air flow. Each premixing nozzle includes a center body, at least one vane, a burner tube provided around the center body, at least two cooling passages, a fuel cooling passage to cool surfaces of the center body and the at least one vane, and an air cooling passage to cool a wall of the burner tube. The cooling passages prevent the walls of the center body, the vane(s), and the burner tube from overheating during flame holding events. | 01-19-2012 |
20130239581 | Systems and Methods for Preventing Flashback in a Combustor Assembly - Embodiments of the present application include a combustor assembly. The combustor assembly may include a combustion chamber, a first plenum, a second plenum, and one or more elongate air/fuel premixing injection tubes. Each of the elongate air/fuel premixing injection tubes may include a first length at least partially disposed within the first plenum and configured to receive a first fluid from the first plenum. Moreover, each of the elongate air/fuel premixing injection tubes may include a second length disposed downstream of the first length and at least partially disposed within the second plenum. The second length may be formed of a porous wall configured to allow a second fluid from the second plenum to enter the second length and create a boundary layer about the porous wall. | 09-19-2013 |
Roger E. Stevenson, Greenwood, SC US
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20100029009 | Methods for Determining Dysregulation of Methylation of Brain Expressed Genes on the X Chromosome to Diagnose Autism Spectrum Disorders - The discovery that alterations in methylation, which can cause one or more genes on the single X chromosome in males to be partially silenced or overexpressed, constitute a predisposition to autism spectrum disorders is generally disclosed herein. These alterations provide the rationale and basis for methods to diagnose autism spectrum disorders. | 02-04-2010 |
20110269132 | Methods for Determining Dysregulation of Methylation of Brain Expressed Genes on the X Chromosome to Diagnose Autism Spectrum Disorders - The discovery that alterations in methylation, which can cause one or more genes on the single X chromosome in males to be partially silenced or overexpressed, constitute a predisposition to autism spectrum disorders is generally disclosed herein. These alterations provide the rationale and basis for methods to diagnose autism spectrum disorders. | 11-03-2011 |