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- W4206163535 endingPage "122848" @default.
- W4206163535 startingPage "122848" @default.
- W4206163535 abstract "Flame stability and fuel energy density are among the main parameters in the design of a thermophotovoltaic (TPV) combustion system. In this research, the flammability limit of the TPV combustor is investigated considering magnesium as the energy carrier. By proposing an asymptotic flame structure and considering the inter-regional radiation and heat loss, the premixed combustion of magnesium in O2/N2,Ar,He media is modeled. The governing equations and boundary conditions are derived and analytically-numerically solved to determine the lean flammability limit (LFL) as well as the flame features. Subsequently, by modifying flame structure and with the aid of analytical method, the closed-form expressions for flame velocity and temperature are obtained. The results indicate that in N2-O2 medium, the increase in the ambient temperature from 300 to 800 K declines the equivalence ratio (ER) of the LFL from 0.16 to 0.03; at 900 K, the flame get stable and has no extinction. Such a rise in the temperature of He- and Ar-containing media decrements the ERs of instability onset by 6.8 and 5.6 times, respectively. For oxygen mass fractions below 0.25, the LFL of Ar-O2 is higher than He-O2. The trend, however, exhibits a reverse pattern at oxygen mass fractions greater than 0.35." @default.
- W4206163535 created "2022-01-25" @default.
- W4206163535 creator A5083960473 @default.
- W4206163535 creator A5085437309 @default.
- W4206163535 date "2022-03-01" @default.
- W4206163535 modified "2023-09-26" @default.
- W4206163535 title "Analytical and numerical evaluation of flammability limit of magnesium-fueled thermophotovoltaic combustor considering inter-regional radiation, heat loss and O2-N2,Ar,He oxidizers" @default.
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- W4206163535 doi "https://doi.org/10.1016/j.fuel.2021.122848" @default.
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