Spray Characteristics of a Fuel Injector: A CFD Study

作者: J. Suresh Kumar , V. Ganesan , J. M. Mallikarjuna , S. Govindarajan

DOI: 10.1007/978-3-642-33841-0_23

关键词: Materials scienceThrottleCarburetorMechanicsSpray characteristicsGasoline direct injectionInjectorFuel injectionLiquid fuelCombustion chamber

摘要: Main function of a fuel injector used in internal combustion (IC) engines is to properly atomize liquid for vaporizing and mixing with air. In order achieve good vaporization mixing, location the inside chamber very critical especially gasoline direct injection engines. automotive engines, vehicle layout possesses main constraint mount at particular orientation. present study, conventional carburetor fitted engine was operated port meet future emission standards two-wheeler application. general, straight cone angle injectors are mainly employed. The direction spray (cone angle) should be targeted minimize wall wetting, which turn affects performance characteristics engine. Therefore, it important study these this CFD analysis has been carried out on understand effect (8 18°) penetration, droplet size, evaporation characteristics. carry analysis, commonly Indian application considered. geometric model generated using ProE software. meshed polyhedral cells surface refinement done intake pipe regions. grid density 0.2 million cells. Analysis inlet air velocity (at outlet throttle body) pressure boundary conditions (cylinder bottom dead center). Outer surfaces considered as walls no-slip condition temperature measured from an actual engine, conditions. wide-open position selected detailed numerical analysis. Out two angles considered, 8° found better terms lower sauter mean diameter (SMD), penetration. However, higher better, due larger spread probability getting energy incoming so that size can smaller will faster, enhance evaporation. At position, velocities, air–fuel rate lesser particle diameter. results have compared steady state measurements test bench predicted match experimental reasonably well maximum deviation less than about 6 %.

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