The influence of in-cylinder flow on the propagation of 2-Butanone and Ethanol sprays is studied. To solely evaluate the interaction of air flow and fuel, high-speed Mie-Scattering Imaging of hollow cone sprays is conducted both in a single-cylinder optical engine with tumble movement and in a pressure vessel with negligible air flow. The direct comparison reveals an improved spray propagation of 2-Butanone due to the engine’s air flow. The lower viscosity of 2-Butanone causes an enhanced jet breakup compared to Ethanol such that the spray consists of more and smaller droplets. Small droplets possess a lower momentum, which allows the droplets to be more efficiently transported by the air flow. Consequently, the fuel distribution across the cylinder is enhanced. As the liquid fuel is distributed to a larger volume, improved convection accelerates evaporation. Finally, 2-Butanone is more volatile compared to Ethanol, which further improves evaporation, such that, 2-Butanone is considered a promising surrogate fuel for Ethanol and Gasoline.
Influence of In-Cylinder Air Flow on Spray Propagation
Sae Int. J. Engines
Sae International Journal of Engines ; 10 , 4 ; 1398-1410
2017-06-29
13 pages
Aufsatz (Konferenz)
Englisch
Section Flow Improvement of Plasma Spray Cylinder in Outboard Motor
SAE Technical Papers | 2013
|Development of plasma spray coated cylinder liners
Kraftfahrwesen | 1996
|Development of Plasma Spray Coated Cylinder Liners
SAE Technical Papers | 1996
|Development of Plasma Spray Coated Cylinder Liners
British Library Conference Proceedings | 1996
|Modelling of Spray and In-cylinder Air Flow Interaction in Direct-Injection Engines
SAE Technical Papers | 2001
|