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

Abstract

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.

Inventors:
 [1];  [1];  [1];  [1]
  1. Morgantown, WV
Issue Date:
Research Org.:
National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1015145
Patent Number(s):
7559234
Application Number:
10/997,090
Assignee:
The United States of America as represented by the United States Department of Energy (Washington, DC)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01M - TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES
DOE Contract Number:  
NETL
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Chorpening, Benjamin T, Thornton, Jimmy, Huckaby, E David, and Richards, George A. Real-time combustion control and diagnostics sensor-pressure oscillation monitor. United States: N. p., 2009. Web.
Chorpening, Benjamin T, Thornton, Jimmy, Huckaby, E David, & Richards, George A. Real-time combustion control and diagnostics sensor-pressure oscillation monitor. United States.
Chorpening, Benjamin T, Thornton, Jimmy, Huckaby, E David, and Richards, George A. Tue . "Real-time combustion control and diagnostics sensor-pressure oscillation monitor". United States. https://www.osti.gov/servlets/purl/1015145.
@article{osti_1015145,
title = {Real-time combustion control and diagnostics sensor-pressure oscillation monitor},
author = {Chorpening, Benjamin T and Thornton, Jimmy and Huckaby, E David and Richards, George A},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2009},
month = {7}
}

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Works referenced in this record:

Statistical characteristics of pressure oscillations in a premixed combustor
journal, February 2003