This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Neutron Radiography of Convective and Thermophoretic Diesel Engine Exhaust Soot Depositions in a Cooled Rectangular Chamber
Technical Paper
2008-01-1174
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
An investigation was performed to study the effects of convection, diffusion and thermophoresis on diesel exhaust soot deposition inside a plate-type rectangular cooling section for recirculation (EGR) applications since deposited soot can be detrimental to the heat transfer efficiency of EGR cooling devices. A non-destructive neutron radiography technique was used to measure the soot deposition thickness distribution on the plate surface inside the cooling chamber. The chamber cooled with an inlet water coolant of 20 and 40°C, was installed in a modified exhaust system of a 2.4kW diesel engine and subjected to a mass flow rate of 20kg/hr of diesel exhaust ranging 0 to 3 hours with the exhaust gas temperature at 260°C upstream of the cooling chamber. In this work, the effect of cooling temperature and operation time on thermophoretic deposition was investigated. Results show the mean soot deposition thickness increases with increasing engine operating time and decreases with increasing inlet coolant temperature. Further based on the soot deposition thickness distribution profile and outside wall surface temperature profile, the thermophoretic soot deposition was dominant since the soot deposition pattern qualitatively matched the temperature profile of the cooling wall. Mechanism of soot deposition will be discussed based on the observed soot deposition.
Recommended Content
Authors
Topic
Citation
dela Cruz, E., Chang, J., Ewing, D., Berezin, A. et al., "Neutron Radiography of Convective and Thermophoretic Diesel Engine Exhaust Soot Depositions in a Cooled Rectangular Chamber," SAE Technical Paper 2008-01-1174, 2008, https://doi.org/10.4271/2008-01-1174.Also In
References
- Zheng M. Reader G. T. Hawley J. G. “Diesel Engine Exhaust Gas Recirculation - A Review on Advanced and Novel Concepts,” Energy Conversion and Management 45 883 900 2004
- Burtscher H. Kunzel S. Huglin C. “Characterization of Particles in Combustion Engine Exhaust,” J. Aero. Sci. 29 389 396 1998
- Charles F. Ewing D. Becard J. Chang J. S. Cotton J. S. “Optimization of the Exhaust Mass Flow Rate and Coolant Temperature for Exhaust Gas Recirculation (EGR) Cooling Devices Used in Diesel Engines,” SAE Paper 2005-01-0654 37 48 2005
- Zhang R. Charles F. Ewing D. Chang J. S. Cotton J. S. “Effect of Diesel Soot Deposition on the Performance of Exhaust Gas Recirculation Cooling Devices,” SAE Paper 2004-01-0122 89 98 2004
- Ismail B. Zhang R. Ewing D. Cotton J. S. Chang J. S. “The Heat Transfer Characteristics of Exhaust Gas Recirculation Cooling Devices,” IMECE Proceedings 539 546 2002
- Beuthe T.G. Chang J.S. “Gas Discharge Phenomena” Handbook of Electrostatic Processes Chang J.S. Kelly A.J. Crowley J.M. New York Marcel Dekker Inc. 1995
- Ismail B. Ewing D. Cotton J. S. Chang J. S. “Characterization of the Soot Deposition Profiles in Diesel Exhaust Gas Recirculation Cooling Devices Using a Digital Neutron Radiography Imaging Technique,” SAE Trans SAE Fuel and Oil 2004 SAE- 2004-01-1433 719 729 2004
- Harvel G. D. Krishnan V.S. Chang J. S. “Determination of Time-Dependent Void Fraction Distribution in Bubbly Two-Phase Flow by a Real-Time Neutron Radiography Technique” Nuclear Technology 109 132 141 1995
- Ismail B. Ewing D. Chang J. S. Cotton J. S. “Development of a non-destructive radiography technique to measure the three-dimensional soot deposition profiles in diesel engine exhaust systems,” J. Aero. Sci. 35 1275 1288 2004
- Von der Hardt, P. Rottger H. Neutron Radiography Handbook Dordrecht, Holand D. Reidel Publishing Company 1981
- Khaial A. Harvel G. D. Chang J. S. “Neutron transport characteristics of a nuclear reactor based dynamic neutron imaging system,” Proc. ICONE-14, 89504 2006
- Duderstadt J. J. Hamilton L. J. Nuclear Reactor Analysis New York John Wiley & Sons 1996