Systems and methods for controlling flame instability
AssigneeKing Abdullah University of Science and Technology
InventorsMin Suk CHA, Yuan XIONG, Suk Ho CHUNG
Life of this patent
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Abstract
A system for controlling flame instability. The system may include a nozzle coupled to a fuel supply line, an insulation housing coupled to the nozzle, a combustor coupled to the nozzle via the insulation housing, where the combustor is grounded, a pressure sensor coupled to the combustor and configured to detect pressure in the combustor, and an instability controlling assembly coupled to the pressure sensor and to an alternating current power supply. The instability controlling assembly can control flame instability of a flame in the system based on pressure detected by the pressure sensor by applying a voltage from the alternating current power supply to the system to create an electric field.
Claims21
A system for controlling flame instability, comprising:
- a nozzle couplable to a fuel supply line;
- a combustor couplable to the nozzle;
- a pressure sensor couplable to the combustor and configured to detect a pressure in the combustor;
- and
- an instability controlling assembly couplable to the pressure sensor and to an alternating current power supply;
- where, the instability controlling assembly is configured to control a flame instability of a flame in the system based on the pressure detected by the pressure sensor by applying a voltage from the alternating current power supply to the system.
2-3. (canceled)
A system for controlling flame instability, comprising:
- a nozzle coupled to a fuel supply line;
- an insulation housing coupled to the nozzle;
- an alternating current power supply coupled to the nozzle;
- a combustor coupled to the insulation housing such that the fuel supply line and the combustor are in fluid communication through the nozzle, where the combustor is grounded;
- a pressure sensor coupled to the combustor and configured to detect a pressure in the combustor;
- and
- an instability controlling assembly coupled to the pressure sensor and to the alternating current power supply, the instability controlling assembly controlling a flame instability of a flame in the system based on the pressure detected by the pressure sensor by applying a voltage from the alternating current power supply to the system to create an electric field.
A method for controlling flame instability in a combustor, comprising:
- activating a system comprising a combustor and a nozzle coupled to and insulated from the combustor to generate an electric field and to form a flame;
- detecting a pressure in the combustor;
- determining a primary frequency and a mean peak pressure of the detected pressure;
- if the mean peak pressure exceeds a maximum endurable pressure:
- generating an alternating current signal having a frequency equal to the primary frequency of the detected pressure and having a phase difference of 180 degrees from the detected pressure;
- and
- amplifying the alternating current signal that is generated;
- and
- if the mean peak pressure continues to exceed the maximum endurable pressure, increasing the phase difference of the alternating current signal that is generated.
Dependencies are inferred from the claim text.