Patent application number | Description | Published |
20100192577 | SYSTEM AND METHOD FOR REDUCING COMBUSTION DYNAMICS IN A TURBOMACHINE - A turbomachine includes a combustion chamber, and at least one pre-mixer mounted to the combustion chamber. The at least one pre-mixer includes a main body having a first end portion that extends to a second end portion. The first end portion is configured to receive an amount of fuel and an amount of air and the second end portion defines an exit plane from which a fuel-air mixture discharges into the combustion chamber. The turbomachine also includes a combustion dynamics reduction system operatively coupled to the at least one pre-mixer. The combustion dynamics reduction system includes at least one of a boundary layer perturbation mechanism and an acoustic wave introduction system which disrupt a flow pattern of the fuel-air mixture within the at least one pre-mixer. | 08-05-2010 |
20100192578 | SYSTEM AND METHOD FOR SUPPRESSING COMBUSTION INSTABILITY IN A TURBOMACHINE - A system for suppressing combustion instability in a turbomachine includes at least one combustion chamber operatively connected to the turbomachine, and at least one pre-mixer mounted to the at least one combustion chamber. The at least one pre-mixer is configured to receive an amount of fuel and an amount of air that is combined and discharged into the at least one combustion chamber. In addition, the turbomachine includes a combustion instability suppression system operatively associated with the at least one pre-mixer. The combustion instability suppression system is configured to create a combustion asymmetry. The combustion asymmetry facilitates combustion instability suppression in the turbomachine. | 08-05-2010 |
20100269505 | SYSTEM AND METHOD FOR CONTROLLING COMBUSTION DYNAMICS - A tunable fluid flow control system for controlling combustion dynamics in a combustor is disclosed. The control system includes a fuel supply path having an inlet portion, a first diverted portion, a second diverted portion, and an exit portion. A first diverted portion has a first length and a first diameter. A second diverted portion has a second length and a second diameter and spaced apart from the first diverted portion. The first and second diverted portions converge at a merging location. The exit portion is coupled to the merging location of the first and second diverted portions. At least one flow regulation device is coupled to the inlet portion and configured to divert fuel flow to the first and second diverted portions alternately to generate fuel flow perturbations at the merging location. | 10-28-2010 |
20100313568 | RESONATOR ASSEMBLY FOR MITIGATING DYNAMICS IN GAS TURBINES - A combustor for a gas turbine engine and related method is provided in which a plurality of combustor cans are selectively adapted with corresponding resonators. The resonators may, for example, be attached to every can in the consecutive arrangement of combustor cans, every other can, every third can or the like, and may be tuned to the same or first, second, third, etc. frequencies of operation. Such selective tuning is configured to suppress one or more of out-of-phase and in-phase dynamic interaction of streams discharged from adjacent combustor cans by changing the frequencies of pressure oscillation instabilities across the arrangement of consecutive cans. | 12-16-2010 |
20110048022 | SYSTEM AND METHOD FOR COMBUSTION DYNAMICS CONTROL OF GAS TURBINE - A combustor minimizes combustion emissions at a lower level of combustion dynamics during combustor even fuel-split conditions by varying the fuel impedance through geometrical changes or inert addition in various nozzle groups than that achievable during combustor even fuel-split conditions with a multi-fuel nozzle combustor using a nozzle fuel impedance that is common to all nozzles while emitting substantially the same level of combustion emissions. | 03-03-2011 |
20110067377 | GAS TURBINE COMBUSTION DYNAMICS CONTROL SYSTEM - A system comprises a gas turbine combustor having a plurality of combustor cans, crossfire tubes for connecting combustor cans, and a tubular connection system connecting the combustor cans to control combustion dynamics. The tubular connection system comprises tubes for connecting at least a pair of the combustor cans. | 03-24-2011 |
20110072826 | CAN TO CAN MODAL DECOUPLING USING CAN-LEVEL FUEL SPLITS - In exemplary embodiments, a gas turbine system is provided. The gas turbine system can include a compressor configured to compress air and combustor cans in flow communication with the compressor, the combustor cans being configured to receive compressed air from the compressor and to combust a fuel stream. The gas turbine system can also include a multi-circuit manifold coupled to the combustor cans and configured to provide a split fuel stream from the fuel stream to the combustor cans. | 03-31-2011 |
20120111019 | SYSTEM AND METHOD FOR COMBUSTION DYNAMICS CONTROL BY ACOUSTIC CONTROL/CANCELLATION OF FUEL FLOW FLUCTUATION AT FUEL INJECTION LOCATION - A combustion dynamics control system for an aviation based or land based gas turbine engine employs an acoustic driver that is configured to drive pressure perturbations across a premixed fuel injection orifice to substantially zero in response to a control signal such that fuel flow perturbations across the fuel injection orifice are substantially zero. | 05-10-2012 |
20130006581 | COMBUSTOR HEALTH AND PERFORMANCE MONITORING SYSTEM FOR GAS TURBINES USING COMBUSTION DYNAMICS - A system and method each utilize combustion dynamics data to monitor and assess gas turbine combustor health and performance. The system and method each employ a physics-based model to differentiate changes in the spectral features attributable to variations in the operating conditions from differences caused from changes in the hardware. | 01-03-2013 |
20130133331 | SYSTEM AND METHOD FOR REDUCING COMBUSTION DYNAMICS IN A TURBOMACHINE - A turbomachine includes a combustion chamber, and at least one pre-mixer mounted to the combustion chamber. The at least one pre-mixer includes a main body having a first end portion that extends to a second end portion. The first end portion is configured to receive an amount of fuel and an amount of air and the second end portion defines an exit plane from which a fuel-air mixture discharges into the combustion chamber. The turbomachine also includes a combustion dynamics reduction system operatively coupled to the at least one pre-mixer. The combustion dynamics reduction system includes at least one of a boundary layer perturbation mechanism and an acoustic wave introduction system which disrupt a flow pattern of the fuel-air mixture within the at least one pre-mixer. | 05-30-2013 |
20140352322 | ANNULAR STRIP MICRO-MIXERS FOR TURBOMACHINE COMBUSTOR - A turbomachine combustor is provided. The turbomachine includes a combustion chamber and multiple micro-mixer nozzles arranged concentrically within a radial combustion liner and configured to receive fuel from one or more fuel supply pipes affixed to each of the plurality of micro-mixer nozzles at an upstream face. The multiple micro-mixer nozzle are also configured to receive air from a flow sleeve surrounding the radial combustion liner. Each of the micro-mixer nozzles include an annular strip having a multiple tubes or passages extending axially from the upstream face to a downstream face of each of the micro-mixer nozzles. | 12-04-2014 |