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Yoo, Chun Sang
Clean Combustion & Energy Research Lab
Research Interests
  • Carbon-free combustion
  • Numerical turbulent combustion
  • Combustion modelling
  • Hydrogen/Ammonia Gas turbine combustion


A DNS study of self-accelerating cylindrical hydrogen-air flames with detailed chemistry

DC Field Value Language Xin, Y.X. ko Yoo, Chun Sang ko Chen, J.H. ko Law, C.K. ko 2014-08-06T06:16:07Z - 2014-08-06 ko 2015-01 ko
dc.identifier.citation PROCEEDINGS OF THE COMBUSTION INSTITUTE, v.35, no.1, pp.753 - 760 ko
dc.identifier.issn 1540-7489 ko
dc.identifier.uri -
dc.description.abstract The self-accelerating expanding cylindrical stoichiometric hydrogen-air flames at eight atmospheres were studied via two-dimensional direct numerical simulation (DNS) of the full compressible Navier-Stokes equations with detailed chemistry. The flame morphology and propagation were finely resolved by the application of a time step of 2.5 ns and a grid size of 4 μm. Temporally, the intermittent propagation of the flame front is captured through examining its propagation velocity. Spatially, the flame front is found to be comprised of segments exhibiting similar propagation properties, i.e. the intermittent instantaneous propagation of the flame front is attributed to the development of cellular structures induced by hydrodynamic instability. The long-term average propagation velocity of the flame front is described by a power law, with a self-acceleration exponent of 1.22 for the flame radius with respect to time. The increase in the global flame velocity is shown to be primarily a consequence of increased flame surface area, with the local front propagation velocity remaining largely at the constant laminar flame speed for the near-unity Lewis number mixture studied herein. ko
dc.description.statementofresponsibility close -
dc.language 영어 ko
dc.publisher ELSEVIER SCIENCE INC ko
dc.title A DNS study of self-accelerating cylindrical hydrogen-air flames with detailed chemistry ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-84937628666 ko
dc.identifier.wosid 000348047500076 ko
dc.type.rims ART ko
dc.description.wostc 0 *
dc.description.scopustc 0 * 2015-05-06 * 2014-08-21 *
dc.identifier.doi 10.1016/j.proci.2014.06.076 ko
dc.identifier.url ko
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