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Experimental Investigation of a Generic, Fuel Flexible Reheat Combustor at Gas Turbine Relevant Operating Conditions

[+] Author Affiliations
Julia M. Fleck, Peter Griebel, Adam M. Steinberg, Michael Stöhr, Manfred Aigner

German Aerospace Center (DLR), Stuttgart, Germany

Andrea Ciani

Alstom Power Ltd., Baden, Switzerland

Paper No. GT2010-22722, pp. 583-592; 10 pages
doi:10.1115/GT2010-22722
From:
  • ASME Turbo Expo 2010: Power for Land, Sea, and Air
  • Volume 2: Combustion, Fuels and Emissions, Parts A and B
  • Glasgow, UK, June 14–18, 2010
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4397-0 | eISBN: 978-0-7918-3872-3
  • Copyright © 2010 by ASME and Alstom Technology, Ltd.

abstract

Fuel flexibility in stationary gas turbines (GT) is becoming increasingly important due to the use of a broader spectrum of primary energy sources, particularly H2 -rich fuels derived from the gasification of coal or biomass. GTs also must be able to operate at extremely low emission levels, which is currently achieved with lean-premixed burner designs. To investigate the performance of highly reactive fuels in the reheat combustion concept, mainly with respect to autoignition and flashback limits, a generic reheat combustor with excellent optical access has been developed. The first objective of this work was to carefully characterize the mixing section in order to derive well-defined boundary conditions for the subsequent autoignition studies. Initial autoignition results at T > 1000 K and p = 15 bar are presented for natural gas (NG) and H2 -rich fuels. No autoignition was detected for NG at the investigated operating conditions. For H2 /NG/N2 blends with a constant volumetric N2 concentration of 20% and H2 concentrations higher than 76%, autoignition in the mixing section was detected.

Copyright © 2010 by ASME and Alstom Technology, Ltd.

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