Combustion oscillation control by cyclic fuel injection

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Description

A number of recent articles have demonstrated the use of active control to mitigate the effects of combustion instability in afterburner and dump combustor applications. In these applications, cyclic injection of small quantities of control fuel has been proposed to counteract the periodic heat release that contributes to undesired pressure oscillations. This same technique may also be useful to mitigate oscillations in gas turbine combustors, especially in test rig combustors characterized by acoustic modes that do not exist in the final engine configuration. To address this issue, the present paper reports on active control of a subscale, atmospheric pressure nozzle/combustor ... continued below

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9 p.

Creation Information

Richards, G.A.; Yip, M.J.; Robey, E.; Cowell, L. & Rawlins, D. April 1, 1995.

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This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this article can be viewed below.

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  • Richards, G.A.
  • Yip, M.J. USDOE Morgantown Energy Technology Center, WV (United States)
  • Robey, E. EG&G Technical Services of West Virginia, Morgantown Energy Technology Center, WV (United States)
  • Cowell, L.
  • Rawlins, D. Solar Turbines, Inc., San Diedgo, CA (United States)

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Description

A number of recent articles have demonstrated the use of active control to mitigate the effects of combustion instability in afterburner and dump combustor applications. In these applications, cyclic injection of small quantities of control fuel has been proposed to counteract the periodic heat release that contributes to undesired pressure oscillations. This same technique may also be useful to mitigate oscillations in gas turbine combustors, especially in test rig combustors characterized by acoustic modes that do not exist in the final engine configuration. To address this issue, the present paper reports on active control of a subscale, atmospheric pressure nozzle/combustor arrangement. The fuel is natural gas. Cyclic injection of 14% control fuel in a premix fuel nozzle is shown to reduce oscillating pressure amplitude by a factor of 0.30 (i.e., {approximately}10 dB) at 300 Hz. Measurement of the oscillating heat release is also reported.

Physical Description

9 p.

Notes

OSTI as DE95009548

Source

  • 40. International gas turbine and aeroengine congress and exposition, Houston, TX (United States), 5-8 Jun 1995

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  • Other: DE95009548
  • Report No.: DOE/METC/C--95/7179
  • Report No.: CONF-950629--3
  • Office of Scientific & Technical Information Report Number: 39709
  • Archival Resource Key: ark:/67531/metadc686187

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Creation Date

  • April 1, 1995

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • Nov. 19, 2015, 6 p.m.

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Richards, G.A.; Yip, M.J.; Robey, E.; Cowell, L. & Rawlins, D. Combustion oscillation control by cyclic fuel injection, article, April 1, 1995; Morgantown, West Virginia. (digital.library.unt.edu/ark:/67531/metadc686187/: accessed September 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.