A displacement based 3D finite element model is developed to simulate thermal stress induced by high temperature and temperature gradient during diesel particulate filter (DPF) regeneration. The temperature field predicted by 3D regeneration model from previous work is used as input. This finite element model agrees well with commercial software. It is a self-contained package capable of implementing meshing body, assembling global stiffness matrix and solving final equilibrium equations. Numerical simulation indicates that it is peak temperature rather than temperature gradient that leads to higher compressive thermal stress during regeneration. The maximum stress always appears at the channel corner located at the end of DPF. Parametric studies are performed to investigate the effects of DPF design on pressure drop, regeneration temperature, and thermal stress. This model provides insights into the complicated DPF working mechanism, and it can be used as design tools to reduce filter pressure drop while enhance its short term and long term durability.
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e-mail: zzhang5@unl.edu.
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January 2009
Research Papers
Three–Dimensional Transient Elastic Thermal Stress Field During Diesel Particulate Filter Regeneration
Zhenhua Guo,
Zhenhua Guo
Department of Mechanical Engineering,
University of Nebraska-Lincoln
, Lincoln, NE 68588
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Zhaoyan Zhang,
Zhaoyan Zhang
Department of Mechanical Engineering,
e-mail: zzhang5@unl.edu.
University of Nebraska-Lincoln
, Lincoln, NE 68588
Search for other works by this author on:
Biqing Sheng,
Biqing Sheng
Department of Mechanical Engineering,
University of Nebraska-Lincoln
, Lincoln, NE 68588
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Wen Peng
Wen Peng
Department of Mechanical Engineering,
University of Nebraska-Lincoln
, Lincoln, NE 68588
Search for other works by this author on:
Zhenhua Guo
Department of Mechanical Engineering,
University of Nebraska-Lincoln
, Lincoln, NE 68588
Zhaoyan Zhang
Department of Mechanical Engineering,
University of Nebraska-Lincoln
, Lincoln, NE 68588e-mail: zzhang5@unl.edu.
Biqing Sheng
Department of Mechanical Engineering,
University of Nebraska-Lincoln
, Lincoln, NE 68588
Wen Peng
Department of Mechanical Engineering,
University of Nebraska-Lincoln
, Lincoln, NE 68588J. Eng. Gas Turbines Power. Jan 2009, 131(1): 012802 (9 pages)
Published Online: November 20, 2008
Article history
Received:
April 17, 2007
Revised:
May 20, 2008
Published:
November 20, 2008
Citation
Guo, Z., Zhang, Z., Sheng, B., and Peng, W. (November 20, 2008). "Three–Dimensional Transient Elastic Thermal Stress Field During Diesel Particulate Filter Regeneration." ASME. J. Eng. Gas Turbines Power. January 2009; 131(1): 012802. https://doi.org/10.1115/1.2979000
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