Study of the influence of the needle eccentricity on the internal flow in diesel injector nozzles by computational fluid dynamics calculations
Study of the influence of the needle eccentricity on the internal flow in diesel injector nozzles by computational fluid dynamics calculations
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DOI：
10.1080/00207160.2013.770483
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发表时间：
2014-01
影响因子：
1.8
通讯作者：
F. J. Salvador;J. Martínez-López;J. Romero;M. Roselló
中科院分区：
文献类型：
--
作者：
F. J. Salvador;J. Martínez-López;J. Romero;M. Roselló
本文对真实的多孔微囊喷管中针阀偏心的影响进行了计算研究。在柴油机的典型工况下对该喷嘴进行了模拟，特别注意了排放孔内的内部流动发展和气穴现象。为此，已使用基于均相平衡模型和正压状态方程的多相流解算器，通过重新归一化组k-S模型的雷诺平均Navier-Stokes方法引入湍流效应。从这项调查中获得的结果表明，针的位置对流动特性的巨大影响，显示重要的孔到孔的差异。
In the present paper, a computational study has been performed in order to clarify the effects of the needle eccentricity in a real multihole microsac nozzle. This nozzle has been simulated at typical operating conditions of a diesel engine, paying special attention to the internal flow development and cavitation appearance within the discharge orifices. For that purpose, a multiphase flow solver based on a homogeneous equilibrium model with a barotropic equation of state has been used, introducing the turbulence effects by Reynolds-averaged Navier–Stokes methods with a re-normalization group k–ϵ model. The results obtained from this investigation have demonstrated the huge influence of the needle position on the flow characteristics, showing important hole to hole differences.