噴霧燃焼過程におけるエントロピー生成速度に及ぼす油滴群燃焼挙動の影響(熱工学,内燃機関,動力など)

概要

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Thermodynamic irreversibilities in a spray combustion process were evaluated at group combustion and single droplet combustion conditions. Two-dimensional governing equations for gaseous and disperse phase were solved by using numerical simulation, and one-step global reaction for n-decane was used as combustion reaction model. The entropy generation rate is introduced to quantify thermodynamic irreversivilities. The contribution by each factor of entropy generation rate, i.e. viscous dissipation, heat conduction, mass transfer and chemical reaction, was compared. In single droplet combustion mode and internal group combustion mode, chemical reaction become the dominant factor in entropy generation. The entropy generation rate due to chemical reaction was reduced at group combustion condition, and its behavior of reduction was determined by transient combustion states at center and outer of the spray region.
2010-09-25