Open Access

ARTICLE

Experimental Study on Gas Flow Uniformity in a Diesel Particulate Filter Carrier

by Zhengyong Wang¹, Jianhua Zhang², Guoliang Su³, Peixing Yang⁴, Xiantao Fan⁴, Shuzhan Bai¹, Ke Sun^1,*, Guihua Wang^1,*

1 School of Energy and Power Engineering, Shandong University, Jinan, 250061, China
2 State Key Laboratory of Engines, Tianjin University, Tianjin, 300072, China
3 Weichai Power Emission Solutions Technology Company Limited, Weifang, 261043, China
4 China·Shandong·YYO Emission Control System Co., Ltd., Liaocheng, 252100, China

* Corresponding Authors: Ke Sun. Email: ; Guihua Wang. Email:

Fluid Dynamics & Materials Processing 2024, 20(1), 193-204. https://doi.org/10.32604/fdmp.2023.030561

Received 12 April 2023; Accepted 08 June 2023; Issue published 08 November 2023

Abstract

A Diesel Particulate Filter (DPF) is a critical device for diesel engine exhaust products treatment. When using active-regeneration purification methods, on the one hand, a spatially irregular gas flow can produce relatively high local temperatures, potentially resulting in damage to the carrier; On the other hand, the internal temperature field can also undergo significant changes contributing to increase this risk. This study explores the gas flow uniformity in a DPF carrier and the related temperature behavior under drop-to-idle (DTI) condition by means of bench tests. It is shown that the considered silicon carbide carrier exhibits good flow uniformity, with a temperature deviation of no more than 2% with respect to the same radius measurement point at the outlet during the regeneration stage. In the DTI test, the temperature is relatively high within r/2 near the outlet end, where the maximum temperature peak occurs, and the maximum radial temperature gradient is located between r/2 and the edge. Both these quantities grow as the soot load increases, thereby making the risk of carrier burnout greater. Finally, it is shown that the soot load limit of the silicon carbide DPF can be extended to 11 g/L, which reduces the frequency of active regeneration by approximately 40% compared to a cordierite DPF.

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