On the stability range of a cylindrical combustor for operation in the flox regime

Daniel C. Vaz, Jos P. Van Buijtenen, António R J Borges, Hartmut Spliethoff

Research output: Contribution to conferencePaper

8 Citations (Scopus)

Abstract

The implementation of flameless combustion in gas turbines is a recent research topic motivated by the potential for ultra-low NO x emissions and improvement of the combustion acoustics. This paper presents preliminary results of the implementation of flameless oxidation in a laboratory model of a cylindrical combustor (in view of stationary and micro gas turbines). Guidelines are given for the start-up of this combustion system. The experimental study then assesses, for atmospheric conditions, the combined effect of the air-to-fuel ratio, wall temperature and jet velocity on combustion stability. Global volumetric heat releases up to 16 MW/m 3, and air preheat up to 265 °C are attained. The numerical simulations give insight into the recirculating pattern of the flow and the state of mixing of reactants and products in the near-nozzle region. The turbulence-chemistry interaction is accounted for by means of the non-premixed flamelet-PDF approach (including finite rate chemistry and scalar dissipation rates up to the extinction limit).

Original languageEnglish
Pages511-516
Number of pages6
Publication statusPublished - 2004
Event2004 ASME Turbo Expo - Vienna, Austria
Duration: 14 Jun 200417 Jun 2004

Conference

Conference2004 ASME Turbo Expo
CountryAustria
CityVienna
Period14/06/0417/06/04

Keywords

  • Combustion stability
  • Experimental
  • Flameless oxidation
  • Gas turbine combustor
  • Numerical

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