A study on oxy-fuel combustion system with multi-jet burner - Numerical simulation with PDF combustion model

Hyeon Jun Kim, Wonyoung Choi, Soo Ho Bae, Jung Goo Hong, Hyun Dong Shin

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

The characteristics of nonpremixed oxy-fuel flame in a multi-jet burner were experimentally and numerically investigated. The overall flow rate of fuel and oxygen was fixed, and the oxygen feeding ratio (OFR) was varied by 0.25,0.5, and 0.75. The results of numerical simulation were compared with the measured results which are temperature profile and direct flame observation. The probability density function (PDF) model was applied accounting to the description between turbulence and chemistry, and standard k-ε model was used for turbulent flow field. Equilibrium assumption is very reasonable due to fast chemistry of the oxy-fuel combustion. Thus, the equilibrium calculation based on Gibbs free energy minimization was guaranteed to generate the solution of the oxy-fuel combustion. The result was obtained by numerical simulation. The predicted radial temperature profiles were in good agreement with the measured results. The flame length was shorten and was intensified with the decrease of OFR because the mixture of fuel and oxidizer are fast mixed and burnt. The maximum temperature became lower as the OFR increased, as a consequence of large flame surface area.

Original languageEnglish
Pages (from-to)504-512
Number of pages9
JournalTransactions of the Korean Society of Mechanical Engineers, B
Volume32
Issue number7
DOIs
StatePublished - Jul 2008

Keywords

  • Multi-jet burner
  • Oxy-fuel flame

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