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Title: Time varying voltage combustion control and diagnostics sensor

Abstract

A time-varying voltage is applied to an electrode, or a pair of electrodes, of a sensor installed in a fuel nozzle disposed adjacent the combustion zone of a continuous combustion system, such as of the gas turbine engine type. The time-varying voltage induces a time-varying current in the flame which is measured and used to determine flame capacitance using AC electrical circuit analysis. Flame capacitance is used to accurately determine the position of the flame from the sensor and the fuel/air ratio. The fuel and/or air flow rate (s) is/are then adjusted to provide reduced flame instability problems such as flashback, combustion dynamics and lean blowout, as well as reduced emissions. The time-varying voltage may be an alternating voltage and the time-varying current may be an alternating current.

Inventors:
 [1];  [1];  [1];  [2]
  1. Morgantown, WV
  2. Fairmont, WV
Publication Date:
Research Org.:
U.S. Dept. of Energy, Washington, D.C. (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1018215
Patent Number(s):
7,927,095
Application Number:
11/864,998
Assignee:
The United States of America as represented by the United States Department of Energy (Washington, DC)
Resource Type:
Patent
Resource Relation:
Patent File Date: 2007 Sep 30
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Chorpening, Benjamin T., Thornton, Jimmy D., Huckaby, E. David, and Fincham, William. Time varying voltage combustion control and diagnostics sensor. United States: N. p., 2011. Web.
Chorpening, Benjamin T., Thornton, Jimmy D., Huckaby, E. David, & Fincham, William. Time varying voltage combustion control and diagnostics sensor. United States.
Chorpening, Benjamin T., Thornton, Jimmy D., Huckaby, E. David, and Fincham, William. Tue . "Time varying voltage combustion control and diagnostics sensor". United States. https://www.osti.gov/servlets/purl/1018215.
@article{osti_1018215,
title = {Time varying voltage combustion control and diagnostics sensor},
author = {Chorpening, Benjamin T. and Thornton, Jimmy D. and Huckaby, E. David and Fincham, William},
abstractNote = {A time-varying voltage is applied to an electrode, or a pair of electrodes, of a sensor installed in a fuel nozzle disposed adjacent the combustion zone of a continuous combustion system, such as of the gas turbine engine type. The time-varying voltage induces a time-varying current in the flame which is measured and used to determine flame capacitance using AC electrical circuit analysis. Flame capacitance is used to accurately determine the position of the flame from the sensor and the fuel/air ratio. The fuel and/or air flow rate (s) is/are then adjusted to provide reduced flame instability problems such as flashback, combustion dynamics and lean blowout, as well as reduced emissions. The time-varying voltage may be an alternating voltage and the time-varying current may be an alternating current.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2011},
month = {4}
}

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Works referenced in this record:

Combustion imaging from electrical impedance measurements
journal, March 1996