AM06-23-010 LESによる直噴ガソリンエンジン用スリットノズルの噴霧流れ解析(燃焼・反応流(2),一般講演)

概要

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In this study, numerical simulation has been conducted for the spray injected from a slit nozzle injector for a direct gasoline engine. The droplets in the spray were investigated by the combination of Large Eddy Simulation (LES) and Lagrangian Discrete Droplet Method (DDM). It is known that droplets are atomized through the primary breakup induced by the instability of the liquid surface and secondary breakup induced by relative velocity between droplet and surrounding gas. In this study, the diameters of droplets are yielded up as an initial condition assuming primary breakup. Introducing TAB breakup model as secondary breakup, it is discussed the effect on breakup result from initial conditions or model constants. In addition, introducing another secondary breakup model, Pilch and Erdman model, the characteristics in both models are reviewed.
日本流体力学会の論文
2006-09-05