RT Journal Article ID 3c75a04f317e2fdc A1 Jiang, Tsung-Leo A1 Chiu, Huei-Huang T1 SPRAY GROUP COMBUSTION IN A CYLINDRICAL NONPREMIXED COMBUSTOR JF Atomization and Sprays JO AAS YR 1993 FD 1993-06-01 VO 3 IS 2 SP 203 OP 221 AB The present spray combustion computation studies numerically the effects of spray angles and injected droplet sites on the combustion efficiency and combustion modes of a cylindrical, nonpremixed combustor through implementation of a realistic droplet combustion model. Combustion efficiency increases with increasing spray cone angle, achieving a maximum value at an optimal injected mean droplet size. The predicted combustion modes indicate that fuel is consumed by the complementary processes of droplet and gas-phase combustion, and are significantly influenced by both spray cone angle and injected mean droplet size. Two flame patterns are identified based on injected droplet size. Small droplet spray is characterized by a diffusion flame separating the fuel and air streams, while large droplet spray exhibits intense mixed droplet and gas-phase combustion near the combustor watt. The results show that combustion efficiency for the former and latter increases and decreases, respectively, with increasing injected droplet sizes. The optimal injected droplet size is therefore suggested to occur at the transition between these two flame patterns. PB Begell House LK https://www.dl.begellhouse.com/journals/6a7c7e10642258cc,4be396ea2e6d5add,3c75a04f317e2fdc.html