Combustion oscillation control by cyclic fuel injection [electronic resource].
- Washington, D.C. : United States. Dept. of Energy, 1995. and Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
- Physical Description:
- 9 pages : digital, PDF file
- Additional Creators:
- United States. Department of Energy and United States. Department of Energy. Office of Scientific and Technical Information
- Restrictions on Access:
- Free-to-read Unrestricted online access
- 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., ∼10 dB) at 300 Hz. Measurement of the oscillating heat release is also reported.
- Published through SciTech Connect., 04/01/1995., "doe/metc/c--95/7179", " conf-950629--3", "DE95009548", "NONE", 40. International gas turbine and aeroengine congress and exposition, Houston, TX (United States), 5-8 Jun 1995., Richards, G.A.; Yip, M.J.; Robey, E.; Cowell, L.; Rawlins, D., and USDOE Morgantown Energy Technology Center, WV (United States)
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