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- W1987454328 abstract "Past experimental work has indicated that fuel droplets commonly burn in accordance with a law, derived from a quasi-steady-state gas-phase (QS) model, that states that the square of the diameter of the burning droplet decreases linearly with time. However, the QS modeling approach also predicts that the ratio of flame radius to droplet radius will be constant during burning, inconsistent with experimental observation that the flame radius first increases and then decrease with time, with the ratio of flame radius to droplet radius increasing monotonically with time. In this paper, a numerical analysis procedure has been used to relax the quasi-steady assumption while maintaining other assumptions and approximations of the QS model. It is found from these calculations that the gas behavior is very nearly quasi-steady at the droplet surface but deviates significantly from quasi-steady behavior out at the flame location, resulting in predictions in qualitative agreement with experimental observations. In addition, this modeling approach has been applied to analysis of combustion of liquid heptane fuel injected through a porous sphere at a rate equal to the rate at which it evaporates (no surface accumulation of liquid); these calculations also indicate equal to the rate at which it evaporates (no surface accumulation of liquid); these calculations also indicate rapid approach to quasi-steady behavior immediately adjacent to the porous sphere (leading to nearly steady fuel vaporization rate) but a much slower approach to quasi-steady behavior in the flame region (and thus slow approach to an asymptotic flame radius value)." @default.
- W1987454328 created "2016-06-24" @default.
- W1987454328 creator A5084813081 @default.
- W1987454328 date "1996-01-01" @default.
- W1987454328 modified "2023-09-25" @default.
- W1987454328 title "An unsteady-state analysis of porous sphere and droplet fuel combustion under microgravity conditions" @default.
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- W1987454328 doi "https://doi.org/10.1016/s0082-0784(96)80339-0" @default.
- W1987454328 hasPublicationYear "1996" @default.
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