21504 液滴数密度を考慮したディーゼル噴霧の数値解析(船舶の環境関連技術の新しい展開(1),OS.14 船舶の環境関連技術の新しい展開,学術講演)

概要

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Discrete droplet model (DDM) is widely used to calculate diesel sprays. In DDM, the spray tip penetration and the spray volume are often underpredicted. Therefore, various submodels such as breakup, drag force and collision models, are developed and improved. In this study, a newly developed drag force model, containing the drag reduction effect with the droplet spacing as a parameter is adopted and also, the effect on the spray tip penetration and the spray volume is examined. As a result, the drag reduction has much effect on the spray volume. The calculation results at the injection pressure of 133 and 55 MPa indicated good agreements with experiments.
社団法人日本機械学会の論文
2008-03-13