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Development and validation of a theoretical model for diesel spray penetration

机译：柴油喷雾渗透理论模型的开发与验证

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A research on the diesel spray injected into stagnant ambient air in a chamber is reported in this paper. The main objective of the investigation is to carry out an in-depth analysis on the influence of injection parameters on the spray internal dynamics and spray macroscopic characteristics. As a result of a theoretical approach based on momentum flux conservation along the sprays' axis, a model which predicts the spray axis velocity and spray tip penetration is obtained. Measurements of momentum flux and spray cone angle are needed in order to predict axis velocity and>spray penetration. The chamber density is assumed to be constant and equal to the density of the pressurized air inside the chamber. A Gaussian radial profile is assumed for the axial velocity. Experimental results from a conventional common rail injection system with five axisymmetric nozzles tested in a wide range of injection pressure values and density conditions have been used in order to obtain additional information of the model and also for validation purposes. These experimental results include a large number of momentum flux (impact force), spray tip penetration and spray cone angle measurements.
机译：本文报道了将柴油喷雾喷入室内停滞的环境空气的研究。研究的主要目的是对喷射参数对喷雾内部动力学和喷雾宏观特性的影响进行深入分析。作为基于沿着喷雾轴线的动量通量守恒的理论方法的结果，获得了预测喷雾轴线速度和喷雾尖端渗透的模型。需要测量动量通量和喷雾锥角，以预测轴速度和>喷雾渗透。假设腔室密度是恒定的，并且等于腔室内的压缩空气的密度。假定轴向速度为高斯径向轮廓。为了获得模型的附加信息并用于验证目的，已使用来自常规共轨喷射系统的实验结果，该系统具有在广泛的喷射压力值和密度条件下测试的五个轴对称喷嘴。这些实验结果包括大量的动量通量（冲击力），喷嘴尖端穿透和喷雾锥角测量。

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