Flash boiling spray has been regarded as a promising fuel injection technology. Many investigations have focused on physics and mechanisms of flash spray, but information alcohols in GDI engines is very limited. In this paper, the characteristics, flame propagation, combustion analysis, PN emissions butanol isomers under studied. A constant volume chamber with high-speed camera used to investig...

Flash boiling atomization has been considered a promising approach to enhance spray atomization. Increasing the fuel temperature or reducing ambient pressure can promote phase-change of spray, and be achieved during this process, so that enhanced. However, strong evaporative feature flash induced high vapor concentration in plume thus changes characteristics. To understand impacts phase on prop...

When liquid fuel is injected under superheated conditions, it would experience rapid evaporation in the form of flash boiling. Bubbles constantly generated inside can enhance atomization and spray, further changes spray macroscopic structure. Former studies have shown that presence high volatility significantly prompt low fuel. However, effects component proportion on boiling multi-component no...

Direct-injection spark-ignition engines can be more sensitive to fuel type as the time available for spray formation and mixing is rather limited. The challenge further complicated by stock which includes a significant bio-derived component in some markets manage sustainability. thermophysical properties of bio-components like ethanol differ markedly from typical hydrocarbons found gasoline iso...

Abstract The substitution of the toxic hydrazine in current high-altitude rocket engines like upper stages or reaction control thrusters by green propellants is a major key driver technology development propulsion systems. Operating these kind at leads to sudden pressure drop liquid during their injection into combustion chamber with near-vacuum atmosphere prior ignition. resulting superheated ...