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首页> 外文会议>SAE World Congress >Multi-Dimensional Modelling and Simulation of Wall-Flow Diesel Particulate Filter During Loading and Regeneration
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Multi-Dimensional Modelling and Simulation of Wall-Flow Diesel Particulate Filter During Loading and Regeneration

机译：壁流柴油机颗粒过滤器加载和再生过程中的多维建模与仿真

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摘要

In the present work, a multi-dimensional model was developed for wall-flow diesel particulate filter (DPF). The flow and temperature fields of representative channels were obtained by solving conservation of mass, momentum and energy equations together with spherical unit collector model, which was used to predict the filtration behavior of porous media. 3-D Navier-Stokes equations were simplified by employing order of magnitude analysis based on typical DPF design. By assuming a similarity velocity profile in the cross flow directions, simplified 3-D Navier-Stokes equations were approximated by a set of one-dimensional conservation equations. They were then solved by combining shooting method and Runge-Kutta method. 3-D transient conservation of energy was solved using a modified ADI method to find the temperature distribution of the DPF. The model was validated by comparing numerical model results with analytical, numerical and experimental results in the literature. Good agreement was observed. Parametric studies of DPF during loading and regeneration as well as the effects of particulate loading on temperature during regeneration were carried out. This model can provide insight to the physical processes in the DPF and can be used as an engineering tool for DPF design.
机译：在本作工作中，为壁流柴油颗粒过滤器（DPF）开发了多维模型。通过求解质量，动量和能量方程以及球形单元收集器模型来获得代表性通道的流动和温度场，其用于预测多孔介质的过滤行为。通过基于典型DPF设计的幅度分析顺序简化了3-D Navier-Stokes方程。通过在横流方向上的相似性速度分布，通过一组一维保护方程近似简化的3-D Navier-Stokes方程。然后通过组合拍摄方法和跑步-Kutta方法来解决它们。使用改进的ADI方法解决了3-D瞬态节能，以找到DPF的温度分布。通过将数值模型结果与文献中的分析，数值和实验结果进行比较来验证该模型。观察到良好的一致意见。进行了加载和再生过程中DPF的参数研究以及再生过程中颗粒加载对温度的影响。该模型可以为DPF中的物理过程提供洞察，可以用作DPF设计的工程工具。

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