Using ducted fuel injection to attenuate or prevent soot formation in mixing-controlled combustion strategies for engine applications
Abstract
Ducted fuel injection is a strategy that can be used to enhance the fuel/charge-gas mixing within the combustion chamber of a direct-injection compression-ignition engine. The concept involves injecting the fuel through a small tube within the combustion chamber to make the most fuel-rich regions of the micture in the autoignition zone leaner relative to a conventional free-spray configuration (i.e., a fuel spray that is not surrounded by a duct). This study is a follow-on to initial proof-of-concept experiments that also were conducted in a constant-volume combustion vessel. While the initial natural luminosity imaging experiments demonstrated that ducted fuel injection lowers soot incandescence dramatically, this work adds a more quantitative diffuse back-illumination diagnostic to measure soot mass, as well as investigates the effects on performance of varying duct geometry (axial gap, length, diameter, and inlet and outlet shapes), ambient density, and charge-gas dilution level. The result is that ducted fuel injection is further proven to be effective at lowering soot by 35–100% across a wide range of operating conditions and geometries, and guidance is offered on geometric parameters that are most important for improving performance and facilitating packaging for engine applications.
- Authors:
-
- Sandia National Lab. (SNL-CA), Livermore, CA (United States). Engine Combustion Research Dept.
- Publication Date:
- Research Org.:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Sustainable Transportation Office. Vehicle Technologies Office; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Sustainable Transportation Office. Bioenergy Technologies Office; USDOE Office of Science (SC), Workforce Development for Teachers and Scientists (WDTS); USDOE Office of Science (SC), Office of Workforce Development for Teachers & Scientists (WDTS); USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1466996
- Alternate Identifier(s):
- OSTI ID: 1564380
- Report Number(s):
- SAND2018-0323J
Journal ID: ISSN 0306-2619; 659899
- Grant/Contract Number:
- AC04-94AL85000; NA-0003525
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Applied Energy
- Additional Journal Information:
- Journal Volume: 226; Journal Issue: C; Journal ID: ISSN 0306-2619
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 33 ADVANCED PROPULSION SYSTEMS; Soot; Duct; Diesel; Spray; Mixing; Combustion
Citation Formats
Gehmlich, R. K., Mueller, C. J., Ruth, D. J., Nilsen, C. W., Skeen, S. A., and Manin, J. Using ducted fuel injection to attenuate or prevent soot formation in mixing-controlled combustion strategies for engine applications. United States: N. p., 2018.
Web. doi:10.1016/j.apenergy.2018.05.078.
Gehmlich, R. K., Mueller, C. J., Ruth, D. J., Nilsen, C. W., Skeen, S. A., & Manin, J. Using ducted fuel injection to attenuate or prevent soot formation in mixing-controlled combustion strategies for engine applications. United States. https://doi.org/10.1016/j.apenergy.2018.05.078
Gehmlich, R. K., Mueller, C. J., Ruth, D. J., Nilsen, C. W., Skeen, S. A., and Manin, J. Sat .
"Using ducted fuel injection to attenuate or prevent soot formation in mixing-controlled combustion strategies for engine applications". United States. https://doi.org/10.1016/j.apenergy.2018.05.078. https://www.osti.gov/servlets/purl/1466996.
@article{osti_1466996,
title = {Using ducted fuel injection to attenuate or prevent soot formation in mixing-controlled combustion strategies for engine applications},
author = {Gehmlich, R. K. and Mueller, C. J. and Ruth, D. J. and Nilsen, C. W. and Skeen, S. A. and Manin, J.},
abstractNote = {Ducted fuel injection is a strategy that can be used to enhance the fuel/charge-gas mixing within the combustion chamber of a direct-injection compression-ignition engine. The concept involves injecting the fuel through a small tube within the combustion chamber to make the most fuel-rich regions of the micture in the autoignition zone leaner relative to a conventional free-spray configuration (i.e., a fuel spray that is not surrounded by a duct). This study is a follow-on to initial proof-of-concept experiments that also were conducted in a constant-volume combustion vessel. While the initial natural luminosity imaging experiments demonstrated that ducted fuel injection lowers soot incandescence dramatically, this work adds a more quantitative diffuse back-illumination diagnostic to measure soot mass, as well as investigates the effects on performance of varying duct geometry (axial gap, length, diameter, and inlet and outlet shapes), ambient density, and charge-gas dilution level. The result is that ducted fuel injection is further proven to be effective at lowering soot by 35–100% across a wide range of operating conditions and geometries, and guidance is offered on geometric parameters that are most important for improving performance and facilitating packaging for engine applications.},
doi = {10.1016/j.apenergy.2018.05.078},
journal = {Applied Energy},
number = C,
volume = 226,
place = {United States},
year = {Sat Sep 15 00:00:00 EDT 2018},
month = {Sat Sep 15 00:00:00 EDT 2018}
}
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