Non-intrusive gas-phase temperature measurements inside a porous burner using dual-pump CARS

J. Kiefer, M. C. Weikl, T. Seeger, F. von Issendorff, F. Beyrau, A. Leipertz

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

The porous burner technology is a modern way of energy conversion with a strong potential to achieve high efficiency. marginal pollutant emissions and low fuel Consumption. For it better understanding of the combustion process inside this complex system, accurate measurements of different key parameters are required. In this paper we present to the best Of Our knowledge the first non-intrusive spatially resolved gas-phase temperature and H(2) concentration measurements taken inside such a porous burner. This is achieved by means of dual-pump vibrational coherent anti-Stokes Raman scattering (CARS) at operating conditions of phi = 1 and 1 kW thermal power. Furthermore the combustion of a premixed methane/air mixture (equivalence ratio phi = 0.9) has been studied experimentally at thermal powers of 1, 1.5 and 2.5 kW. Due to the strong heat transfer front the gas-phase to the porous solid structure, the maximum gas temperatures are significantly below calculated adiabatic flame temperatures. The temperature gradient in the medium was found to be small compared to conventional premixed flames. (C) 2009 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
Original languageEnglish
Pages (from-to)3123-3129
Number of pages7
JournalProceedings of the Combustion Institute
Volume32
Issue number2
Early online date7 Sep 2008
DOIs
Publication statusPublished - 2009

Keywords

  • porous burner
  • thermometry
  • dual-pump CARS
  • thermal radiation
  • recuperation

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