Role of radicals on MILD combustion inception
Published version
Peer-reviewed
Repository URI
Repository DOI
Change log
Authors
Doan, NAK
Swaminathan, Nedunchezhian
Abstract
The criterion used to define MILD combustion in non-premixed condition is analysed using Direct Numerical Simulation (DNS) of MILD combustion of methane-diluted air established with internal exhaust gas recirculation. The simulations reveal multiple interacting reaction zones in MILD combustion which are extremely different from conventional combustion. Furthermore, DNS deduced S-curves highlight the role of chemically active species. Specifically, the temperature rise is accompanied with an increase in the scalar dissipation rate of mixture fraction, which is quite contrasting to the classical S-curve from the classical flame theories. This observations is explained on a physical basis.
Description
Keywords
Direct Numerical Simulation (DNS), Exhaust Gas Recirculation (EGR), Moderate or Intense Low-oxygen Dilution (MILD), Flameless combustion, Ignition
Journal Title
Proceedings of the Combustion Institute
Conference Name
Journal ISSN
1873-2704
1873-2704
1873-2704
Volume Title
Publisher
Combustion Institute
Publisher DOI
Sponsorship
EPSRC (1567652)
Engineering and Physical Sciences Research Council (EP/K025791/1)
Engineering and Physical Sciences Research Council (EP/K025791/1)
Qualcomm European Research Studentship Fund in Technology