A NUMERICAL STUDY ON PREMIXED MICROCOMBUSTION BY LATTICE BOLTZMANN METHOD

摘要

Lattice Boltzmann method (LBM) has made great progress in the last decade, and its applicationnbecame wider and wider. In this paper, based on our former combustion LBM model onnthe macroscale, we attempt to extend it into premixed microcombustion simulation. Consideringnthe external heat losses in microcombustion, the second-order implicit scheme fornboundary condition treatment was adopted in our LBM model. Numerical tests have provednthat its accuracy and stability were suitable. Furthermore, planar microcombustion withnbackward-facing step was also studied in order to show its di®erent performances and improvement,nwhich are compared with microcombustor without back step.