Three-Dimensional Simulations of Steady Perforated-Plate Stabilized Propane–Air Premixed Flames

Abstract

A numerical investigation of steady laminar premixed propane−air flames is presented. A three-dimensional simulation has been performed to examine the impact of operating conditions on steady-state characteristics of a perforated burner flame. A numerical simulation has been carried out using a reduced propane−air reaction mechanism having 30 species and 192 reactions. The results are validated against the one-dimensional flat-flame result obtained using PREMIX. Effects of the equivalence ratio, inlet velocity, hole−hole distance, and plate thermal conductivity on flame stability are examined. The flame stand-off distance increases with the increase in the inlet velocity. As the equivalence ratio increases, the heat flux to the plate increases as the flame moves closer to the plate. When the plate is adiabatic, the conical flame rests on the plate. The flame stand-off distance increases as the plate thermal conductivity is increased. The flame moves downstream of the plate as the distance between the adjacent holes is increased.

Characteristics of Oxyfuel Combustion in Lean-Premixed Multihole Burners

“…Jithin et al 17 examined the influence of operating conditions of a premixed laminar flame on steady-state characteristics of a perforated-plate burner. They reported that increasing the inlet velocity increases the stand-off distance of the flame, whereas increasing the equivalence ratio increases the plate heat flux as the flame goes nearer to the plate.…”

Large eddy simulation of impinging flames: Unsteady ignition and flame propagation

“…Such large mechanisms need to be reduced for computationally tractable threedimensional (3-D) simulations. Reduced mechanisms for propane have been developed from detailed chemistry [26,27,28,29], and employed successfully for Reynold-Averaged CFD simulations [28,29]. For example, Jithin et al [29] have performed a three-dimensional simulation to investigate steady laminar premixed propane-air flames using a reduced mechanism with 30 species and 192 reactions.…”

Review of Fuel/Oxidizer-Flexible Combustion in Gas Turbines

“…They have reported higher flame lift-off as well as strong recirculation for larger hole spacing. Considering laminar air combustion on a PPB, Jithin et al 66 have discovered that the flame stand-off distance increases with larger hole spacing. Hindasageri et al 67 have carried out experiments and numerical investigations of the distribution of heat flux from a multi-hole burner holding CH 4 −air flames, considering different hole arrangements at a low Reynolds number (Re).…”