柴油机金属丝纤维过滤器的模拟和试验验证  

Model Simulation and Experimental Validation of a Metallic Fibrous Filter for Diesel Particulate Matter

作　　者：曹韵华[1] 张镇顺[2] 严兆大[1] 

机构地区：[1]浙江大学机械与能源工程学院,浙江杭州310027 [2]香港理工大学机械工程学系

出　　处：《内燃机学报》2004年第1期33-38,共6页Transactions of Csice

摘　　要：建立了一个包括过滤器内部流场和颗粒沉积过程的数值模型。计算得到的过滤效率与柴油机试验的测量结果有较好的一致性。通过模型分析,解释了颗粒尺寸、废气流速等参数对过滤效率的影响机制。Metallic fibrous filter has been used to control the particulate emission of the in-use or the aged diesel vehicles in Hong Kong SAR.In this study,a numerical model,which coupled a stream flow model and a particle deposition model,was established to simulate the filtration process inside such kind of filter.Simulated efficiency results were compared and validated by the data from engine tests.The simulation model was well supported by the experiment and was hopefully to be used as a parametric analysis tool for the filter design.

关 键 词：柴油机 金属丝纤维过滤器 数值模型 颗粒沉积 过滤效率 废气流速 

分 类 号：TK421.5[动力工程及工程热物理—动力机械及工程]