中文摘要：

为获得柴油机微粒捕集器喷油助燃再生过程热工变化特性,在考虑微粒氧化反应次模型的基础上,建立壁流式蜂窝陶瓷过滤体喷油助燃再生数学模型,通过对速度场、压力场、温度场与微粒浓度场等多场耦合求解,研究其再生过程热工参数变化规律。结果表明：喷油助燃装置热工参数、排气特征对过滤体再生过程影响较大。适当增大气油配比、提高喷油压力与喷油速率及加大补气流量均使再生过程中过滤体孔道壁面峰值温度升高,沉积在过滤体孔道壁面上的微粒层氧化燃烧速率加快,缩短过滤体的再生时间,但随着气油配比、补气流量的进一步增大,空气对流散热损失增强,及喷油速率进一步提高,混合气过浓导致燃烧器燃烧性能恶化等影响,孔道沉积微粒氧化速率、壁面峰值温度下降,再生速率降低。排气流量对再生过程的影响与补气流量相似,但从分析结果来看,排气流量能否合适控制对过滤体的再生过程有重要影响。这些规律的提出,为实现微粒捕集器安全、可靠、高效地再生及其过程控制的优化等方面提供依据和技术参考。

英文摘要：

In order to obtain the pyrological characteristics of a burner-type diesel particulate filter （DPF）, the mathematical model of pyrogenation regeneration process for burner-type wall-flow honeycomb ceramic filter was established, considering the subordinate oxidation reaction model. By solving the multi-fields coupling of flow velocity, pressure, temperature and particulate concentration, the variation laws of pyrological parameters were studied during burner-type diesel particulate filter （DPF） regeneration. The results showed that the pyrological parameters of burner-type system and exhaust characteristics had a great impact on the regeneration. With the air-fuel matching ratio, the pressure and rate of fuel injection and the air-supplied quantity increasing, the maximum wall temperature inside the filter channels rose and the oxidation rate of the deposition soot layer on the channel wall was accelerated, which shortened the regeneration process. But when the air-fuel matching ratio and air-supplied quantity increased further, the convection transfer heat loss of the gas flow through the soot layer became enhanced relatively, and when the fuel injection rate was improved further, the oxygen content in exhaust was insufficient, which would cause the combustion performance of the burner worsening, the oxidation rate of the soot layer and the maximum wall temperature decreasing and the regeneration process slowing down. The effect on the regeneration by exhaust mass flux was similar to that of air-supplied quantity, but from the analysis results, whether it could be controlled appropriately would be very important to the filter regeneration. The above laws provide the basis and technical references for the realization of safe, reliable and efficient regeneration and optimum control for diesel particulate filter.