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Real-time combustion control and diagnostics sensor-pressure oscillation monitor

United States Patent

July 14, 2009
View the Complete Patent at the US Patent & Trademark Office
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An apparatus and method for monitoring and controlling the combustion process in a combustion system to determine the amplitude and/or frequencies of dynamic pressure oscillations during combustion. An electrode in communication with the combustion system senses hydrocarbon ions and/or electrons produced by the combustion process and calibration apparatus calibrates the relationship between the standard deviation of the current in the electrode and the amplitudes of the dynamic pressure oscillations by applying a substantially constant voltage between the electrode and ground resulting in a current in the electrode and by varying one or more of (1) the flow rate of the fuel, (2) the flow rate of the oxidant, (3) the equivalence ratio, (4) the acoustic tuning of the combustion system, and (5) the fuel distribution in the combustion chamber such that the amplitudes of the dynamic pressure oscillations in the combustion chamber are calculated as a function of the standard deviation of the electrode current. Thereafter, the supply of fuel and/or oxidant is varied to modify the dynamic pressure oscillations.
Chorpening; Benjamin T. (Morgantown, WV), Thornton; Jimmy (Morgantown, WV), Huckaby; E. David (Morgantown, WV), Richards; George A. (Morgantown, WV)
The United States of America as represented by the United States Department of Energy (Washington, DC), N/A (
10/ 997,090
November 24, 2004
The United States Government has rights in this invention pursuant to Agreement between National Energy Technology Laboratory and the inventors and the employer-employee relationship of the U.S. Department of Energy and the inventors.