A three-region, moving boundary model of a furnace flame

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This paper describes a new, efficient technique for computing first-order spatial dependence of a furnace flame. The technique, called the moving boundary flame model, creates dynamic state variables that track the size of the flame within the furnace. The approximation is appropriate for full plant training simulators, control system analysis, and engineering analyses in which a higher fidelity model than a point reactor model is needed. In comparison to the point reactor models, the one dimensional spatial dependence should improve the accuracy of distributed quantities such as heat transfer and reaction rates over the range fuel and air flow conditions ... continued below

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7 p.

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Wilson, T.L. Jr. February 1, 1997.

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Description

This paper describes a new, efficient technique for computing first-order spatial dependence of a furnace flame. The technique, called the moving boundary flame model, creates dynamic state variables that track the size of the flame within the furnace. The approximation is appropriate for full plant training simulators, control system analysis, and engineering analyses in which a higher fidelity model than a point reactor model is needed. In comparison to the point reactor models, the one dimensional spatial dependence should improve the accuracy of distributed quantities such as heat transfer and reaction rates over the range fuel and air flow conditions that exist in normal and abnormal operation. The model is not intended to replace detailed multi-dimension flow models of the furnace. Although the flame model is a first principles model, the accuracy depends on data from a more detailed combustion simulation or experimental data for volume-averaged parameters such as the turbulent mixing coefficient for fuel and air, radiative and conductive heat transfer coefficients, and ignition and extinction conditions. These inputs can be viewed as tuning parameters used normalize the moving boundary model to a more accurate model at a particular operating point. The expected application for the model is dynamic system analysis for burner diagnostics and controls. Burner diagnostics and controls are expected to be areas for major development to reduce emissions and improve efficiency of commercial fossil fuel power plants.

Physical Description

7 p.

Notes

OSTI as DE97003334

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  • 5. symposium on high performance computing: grand challenges in computer simulation as part of the 1997 simulation multiconference, Atlanta, GA (United States), 6-10 Apr 1997

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  • Other: DE97003334
  • Report No.: CONF-970430--5
  • Grant Number: AC05-96OR22464
  • Office of Scientific & Technical Information Report Number: 459379
  • Archival Resource Key: ark:/67531/metadc674226

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • February 1, 1997

Added to The UNT Digital Library

  • July 25, 2015, 2:21 a.m.

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  • Jan. 25, 2016, 5:06 p.m.

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Wilson, T.L. Jr. A three-region, moving boundary model of a furnace flame, article, February 1, 1997; Tennessee. (digital.library.unt.edu/ark:/67531/metadc674226/: accessed October 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.