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Simulation of MILD combustion using Perfectly Stirred Reactor model

Accepted version
Peer-reviewed

Type

Article

Change log

Authors

Reddy, VM 
Ruan, S 
Doan, NAK 
Roberts, WL 

Abstract

A simple model based on a Perfectly Stirred Reactor (PSR) is proposed for moderate or intense low-oxygen dilution (MILD) combustion. The PSR calculation is performed covering the entire flammability range and the tabulated chemistry approach is used with a presumed joint probability density function (PDF). The jet, in hot and diluted coflow experimental set-up under MILD conditions, is simulated using this reactor model for two oxygen dilution levels. The computed results for mean temperature, major and minor species mass fractions are compared with the experimental data and simulation results obtained recently using a multi-environment transported PDF approach. Overall, a good agreement is observed at three different axial locations for these comparisons despite the over-predicted peak value of CO formation. This suggests that MILD combustion can be effectively modelled by the proposed PSR model with lower computational cost.

Description

Keywords

Moderate or intense low-oxygen dilution (MILD), Flameless combustion, Perfectly Stirred Reactor (PSR), Jet in Hot Coflow (JHC), Correlated joint PDF

Journal Title

Proceedings of the Combustion Institute

Conference Name

Journal ISSN

1540-7489
1873-2704

Volume Title

36

Publisher

Elsevier BV
Sponsorship
Engineering and Physical Sciences Research Council (EP/I027556/1)
ZC acknowledges the financial support of Cambridge Overseas Trusts and China Scholarship Council. SR and NS acknowledge the support of European Union funding through the project AMEL. NAKD acknowledges the financial support of the Qualcomm European Research Studentship Fund in Technology. VMR and WLR acknowledge the support from Center Competitive Fund from KAUST.