Coupling characteristics between transition duct and fuel filling duct in a reverse-flow combustor wave rotor
In order to achieve high-quality fuel distribution in the intake transition duct of a reverse-flow wave rotor combustor,a novel liquid fuel injection structure was proposed.Numerical simulation was used to model the liquid fuel filling effect under different injection hole positions and jet angles.The coupling characteristics between the transition duct and fuel filling duct were analyzed by combining parameters such as droplet residence time,Sauter mean diameter and fuel distribution non-uniformity.The results show that when the injection positions are at 40 mm and 60 mm,a relatively uniform fuel distribution can be achieved at the outlet cross-section of the intake transition duct.With the increase in jet angle,larger scale and stronger intensity vortices are formed in the mixing zone of the bent duct,which further improves the uniformity of fuel distribution at the outlet cross-section.
reverse-flow combustor wave rotorliquid fuel injectionfuel fillingfuel distributionSauter mean diameteraero-engine
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