Liquid Propane Injection in Flash-Boiling Conditions

This study aimed to investigate the influence of flash-boiling conditions on liquid propane sprays formed by a multi-hole injector at various injection pressures. The focus was spray structures, which were analysed qualitatively and quantitatively means spray-tip penetration global angle. effect flash boiling evaluated in terms trends observed for subcooled conditions. Propane injected commercial gasoline direct into constant volume vessel filled with nitrogen pressures from 0.1 MPa up 6 MPa. temperature kept constant. evolution high-speed camera Schlieren set-up. obtained results provided information both regimes, above below saturation pressure propane. Based experimental results, an attempt calibrate simulation model has been made. main advantage is that effects formation investigated Moreover, impact changing viscosity surface tension limited, as same level. showed despite very different behaviours leading structures collapse strong boiling, angle similar conditions, boiling. As numerical model, there no single settings simulate flashing properly. not represented well, making set-up more suitable less superheated sprays.