Abstract
Influence of the simplifications applied to the surrounding gas composition of evaporating droplets in air-blown and oxy-fuel combustion atmospheres
Highlights
Heat and mass transfer on droplets do strongly depend on the carrier gas composition [8, 14, 17, 18]
As a summary for the evaluation of carrier gas simplifications, the results presented in Figs. 1–3 indicate that the MC combination is sufficient for oxy-fuel combustion scenarios
The entire study is conducted within the context of one-dimensional numerical simulations of flames propagating in droplet mists considering a detailed description of the chemistry
Summary
Heat and mass transfer on droplets do strongly depend on the carrier gas composition [8, 14, 17, 18]. On the other hand, detailed information about the mixture composition is seldom available in numerical simulations of combustion processes, as simplified chemistry models are often applied With this aspect in mind, recent works have concentrated efforts on proposing different approaches to improve the description of surrounding gas composition of evaporating droplets in combustion simulations. During the development of [10], where methane oxy-fuel flames diluted with water droplets were studied, it was noticed that the performance of simplifications applied to represent the surrounding gas composition differ from air-blown to oxy-fuel processes. In view of the previously listed aspects, this work investigates and proposes consistent modeling simplifications to represent the surrounding gas composition of water droplets in air-blown and oxy-fuel combustion atmospheres. This work can be seen as a continuation of both [14] and [10], as it complement the modeling strategies proposed in [14] and improve the computational efficiency of water diluted oxy-fuel combustion from the methodology applied in [10]
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