Combustion of a solid particle. [Mathematical models]

Technical Report · Tue Jan 01 00:00:00 EST 1980

DOI:https://doi.org/10.2172/6715335· OSTI ID:6715335

Matalon, M.

We consider the quasi-steady burning of a carbon particle which undergoes gasification at its surface by chemical reactions, followed by a homogeneous reaction in the gas phase. The burning rate M is found as a function of the gas phase Damkoehler number D/sub g/ for the whole range o < D/sub g/ < infinity. The monotonic M(D/sub g/) curve, obtained for relatively very hot or very cold particles, describes the gradual transition from frozen flow to equilibrium. For moderate particle temperatures the transition is abrupt and the M(D/sub g/) curve is either S-shaped or Z-shaped. In the former the burning is enhanced at ignition while in the latter it is slowed down; this depends on the relative importance of the two competitive surface reactions. At extinction, the reverse is true: burning is slowed down in the case of an S curve and is enhanced in the case of a Z curve.

• Research Organization: Polytechnic Inst. of New York, Farmingdale (USA); Northwestern Univ., Evanston, IL (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC01-78ET11056
• OSTI ID: 6715335
• Report Number(s): DOE/ET/11056-T2
• Country of Publication: United States
• Language: English

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