3次元数値流体解析技術を用いたスワールノズルの特性予測手法に関する精度検証(熱工学,内燃機関,動力など)

概要

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A new technique was applied to the swirl nozzles of direct-injection gasoline engines with the aim of predicting their characteristics with higher accuracy. This new technique is based on 3-dimensional Computational Fluid Dynamics (CFD) using a volume of fluid (VOF) model. A new technique using particle image velocimmetry (PIV) was also developed to measure the spray at the exit of the nozzle holes in order to obtain experimental data for validation. This technique made it possible to ascertain the cavity factor, which affects atomization characteristics. The calculated results showed relatively good agreement with the measured results. A conventional method, known as Tanasawa's equation, was also compared with the measured results and shown to be accurate.
2004-01-25