柴油机颗粒物捕集器再生性能仿真分析

Numerical Investigation on Regeneration Performance of DPF

基于GT-Power软件对柴油机颗粒物捕集器(DPF)再生性能进行仿真,分析不同流量、不同微粒担载量条件下DPF的再生性能,重点关注其过滤压降、载体温度、温度梯度和再生效率。结果表明:DPF的压降随着流量与微粒担载量的增加近似呈线性增加的趋势;再生过程中最高温度和最大的温度梯度都出现在载体末端;随着流量的增加,最高温度、最大温度梯度和再生效率呈现先增加后减小的趋势;随着担载量的增加,最高温度和最大温度梯度逐渐增加,而在较大担载量时增加逐渐趋于平坦,再生效率呈现先增加后减小的趋势。

A regeneration model of the Innovation diesel particle filter（ DPF） is established by GT-Power software. The influence of flow rate and soot loading on the DPF regeneration performance is numerically investigated. The performance parameters include： filtration pressure drop,substrate temperature,temperature gradient and regeneration efficiency. The results show that： with the increase of flow rate and soot loading,the pressure drop nearly increases linearly; the maximum temperature and maximum temperature gradient are appeared in the end place of DPF channel in middle zone of filter; with the increase of flow rate,the maximum temperature,maximum temperature gradient and regeneration efficiency increase firstly and then decrease; with the increase of soot loading,the maximum temperature and maximum temperature gradient increase rapidly in low soot loading and then increase slowly in high soot loading,while the regeneration efficiency increase firstly and then decrease with the increase of soot loading.