C111 Numerical Study on Combustion Characteristics of Spray Flat Flames : Time-dependent Burning Behavior of Polydisperse Spray Entering Gaseous Flame Front(Spray/laminar flame)

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Numerical calculations and experimental observations were conducted on combustion processes of n-decane polydisperse spray entering gaseous flat-flame stabilized in laminar 2D counter flow configuration. The both results are compared to each other to ensure validity of the simulation model. The Eulerian/Lagrangian approach was used for the numerical simulations. For the gaseous phase, Navier-Stokes equation together with mass, energy and species conservation equations was solved based on the finite control volume method with SIMPLE algorithm. Transport properties and thermodynamic data of the gaseous species were obtained from CHEMKIN. For the disperse phase, all the individual droplets were tracked without using the concept of "droplet parcel". The film theory was employed for estimating the droplet evaporation rate and the heat transferred from the gaseous phase to the droplet interior. Time evolution of burning processes of fuel spray entering high temperature region of the gaseous flame was discussed. As a result, twin flames of premixed combustion of prevaporized fuel and diffusion combustion of droplet groups were observed on the spray flow side.
一般社団法人日本機械学会の論文
2000-10-01