Modeling two-phase flow in a swirl combustor. Technical progress report, October 9--December 3, 1976

Progress made toward modeling two-phase flow in a swirl combustor is outlined. Work has concentrated on developing a phenomenological model to guide proper scaling. This simple model will also serve as a skeleton for the more detailed computer model which will be developed in the next few months. Scaling relations indicate that the PERC design for the first stage gasifier-combustor for the CDIF should have a higher carbon conversion efficiency, but is likely to have a slightly higher ash carry-over than that which occurs in PERC's laboratory scale model. If desired, the carry-over may be reduced by decreasing the fraction of small coal particles. It also appears that the total pressure drop will be somewhat larger.