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Analysis of the Flow Conditions in a Dosing Pump with Regard to New Fuels

机译:关于新燃料的计量泵中流动条件的分析

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Conveying new fuels with a high proportion of ethanol leads to an increased cavitation tendency inside a pump. This paper presents investigations of the flow conditions in a dosing pump using Computational Fluid Dynamics (CFD). For accurate spatial resolution of fluid mechanical details, a three-dimensional computational analysis of fluid-structure interaction in the outlet valve is surveyed. Comparisons are made by experimental testing. Noteworthy is a technique based on a laser Doppler vibrometer for examining the dynamics of the piston inside the fluid. The applied CFD cavitation model is parameterized and validated by experimental (optical imaging) and numerical investigations of the cavitating flow in an orifice flow. The objective of the developed method is to identify and reduce the potential locations for cavitation in order to ameliorate the high level of delivery accuracy.
机译:用高比例的乙醇输送新燃料,导致泵内的空化趋势增加。 本文介绍了使用计算流体动力学(CFD)的计量泵中流动条件的研究。 为了精确的流体机械细节的空间分辨率,调查了出口阀中的流体结构相互作用的三维计算分析。 比较是通过实验测试进行的。 值得注意的是一种基于激光多普勒振动计的技术,用于检查流体内部活塞的动态。 所应用的CFD空化模型通过实验(光学成像)和孔隙流中的空化流的数值研究进行参数化和验证。 开发方法的目的是识别和减少空化的潜在位置,以便改善高水平的递送精度。

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