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Yao Chunde
Shao Yuping
State Key Laboratory of
Engine Combustion,
Tianjin University,
Tianjin 300072, China
Zhang Chunrun
Zi XinYun
Jiang Dahai
Deng Chenglin
Department of Automotive Engineering,
Military Traffic Institute,
Tianjin 300161, China |
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FLOW
CHARACTERISTICS OF WALL-
FLOW DIESEL PARTICULATE FILTER
SYSTEM WITH REVERSE PULSE
AIR REGENERATION*
Abstract:
To simulate steady airflows inside of wall-flow diesel particulate filters (DPF) with different reverse blowing pipes collocation, a mathematical model of the flow in a DPF is established by an equivalent continuum approach. The experimental results agree well with the theoretical values calculated from the model. Simulation shows that the velocity and the pressure distribution of the filters in the regenerative process are key factors to the filter’s regeneration. How to decrease the mal-distribution of the flow in the filter and how to achieve the better regenerative performance at the least cost of air consumption in the regenerative process are the ultimate goals of the study. Calculation and experiments show that the goals can be realized through adjusting the angle of two reverse blowing pipes and their relative location suitably.
Key words:
Wall-flow filter Reverse pulse air regeneration Flow characteristic Simulation |