Combustor Damping Rate Control for Resonance Suppression
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Solution Overview
Problem
Industrial combustion systems face the challenge of combustion resonance, which causes high amplitude pressure oscillations due to feedback between the flame and combustion chamber acoustics, leading to increased emissions and potential damage through overheating or high-cycle fatigue failure, and is difficult to predict and resolve due to its sensitivity to various factors.
Innovation Solution
A method and system that utilize sensors to measure signals from a combustor associated with an actuator, with a controller calculating the damping rate and modulating the actuator to suppress resonance by adjusting the fuel supply if the damping rate falls below a predefined threshold, using either acoustic or optical sensors to monitor and control the combustor's damping rate in real-time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If real-time monitoring and control systems are implemented to measure and adjust damping rates, then resonance suppression effectiveness is improved, but device complexity and cost increase
Solution Approach 1:
The patent implements a feedback control system where sensors continuously measure combustion chamber pressure oscillations, the controller calculates damping rates in real-time, and actuators adjust combustion parameters based on these measurements. This closed-loop feedback mechanism enables dynamic resonance suppression by continuously monitoring system state and making corrective adjustments, directly resolving the contradiction by providing reliable resonance control through systematic feedback rather than complex ad-hoc solutions
Solution Approach 2:
The patent replaces complex mechanical resonance suppression devices with an electronic control system that uses sensors, controllers, and actuators to achieve the same effect. Instead of using physical dampers or mechanical modifications to the combustion chamber, the system uses electronic measurement of pressure oscillations and electronic control of fuel/air injection timing and quantity to suppress resonance, reducing mechanical complexity while maintaining effectiveness
2Adaptability or versatility
If passive resonance suppression designs are used, then device complexity is reduced, but adaptability to changing operating conditions deteriorates
Solution Approach 1:
The patent transforms the resonance suppression system from a static passive design to a dynamic active system. The controller continuously calculates damping rates based on real-time sensor measurements and dynamically adjusts combustion parameters according to current operating conditions. This dynamic adaptation allows the system to respond to changing fuel compositions, ambient conditions, and load variations, providing versatility without requiring multiple fixed designs for different operating scenarios
Solution Approach 2:
The patent achieves adaptability by continuously monitoring combustion chamber pressure oscillation parameters and adjusting combustion control parameters (fuel injection timing, air-fuel ratio, injection quantity) based on calculated damping rates. This parameter-based control approach allows the system to adapt to different operating conditions by modifying combustion parameters in real-time, replacing the need for complex mechanical reconfiguration or multiple passive suppression devices designed for specific conditions
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Effectively prevents or suppresses resonance in industrial combustion systems, reducing emissions and preventing damage by actively stabilizing the combustion process through real-time control of the fuel supply, thereby enhancing system reliability and reducing maintenance costs.
Implementation Method 1
measuring signals with at least one sensor, wherein the signals are produced by a combustor
Implementation Method 2
the controller calculates a damping rate of the combustor
Implementation Method 3
the controller modulates the actuator if the damping rate falls below a predefined threshold
Data Source
AI summary
Methods and systems for resonance suppression, can involve measuring signals with one or more sensors, wherein the signals are produced by a combustor associated with an actuator, and receiving at a controller the signals measured by the sensor or sensors. The controller can calculate a damping rate of the combustor. Based on the damping rate, the controller can modulate the actuator if the damping rate falls below a predefined threshold and can continue to modulate the actuator until the damping rate is adjusted and the resonance is suppressed. The sensor can be an acoustic sensor, an optical sensor, or another type of sensor.