Spray and combustion characteristics of butanol-diesel and hexanol-diesel blends under high-altitude conditions
Abstract
Due to their excellent fuel properties, butanol and hexanol are considered as two promising renewable fuels for diesel engine applications. The objective of this work is to investigate and compare the spray and combustion characteristics of butanol-diesel and hexanol-diesel blends under high-altitude conditions. A constant volume combustion chamber was used to provide the desired environment. Experiments were conducted under various ambient temperatures ranging from 800 K to 1200 K and various ambient densities ranging from 11 kg/m3 to 15 kg/m3. Fuel blends with 20% blend ratio (B20 and H20) and neat diesel were used as test fuels. The spray and combustion characteristics of the test fuels were analyzed using measured liquid penetration length, ignition delay, combustion duration, flame lift-off length (FLoL), and spatially integrated natural luminosity (SINL). Here the results revealed that B20 and H20 had shorter liquid penetration length than diesel under low ambient temperature and density conditions due to their higher volatility. The blended fuels showed significantly longer ignition delay than diesel under low ambient temperature conditions, but it could be overcome by increasing the ambient temperature. Adding butanol and hexanol into diesel both extended FLoL especially under low ambient temperature and density conditions, but the effects ofmore »
- Authors:
-
- University of Illinois at Urbana-Champaign, IL (United States)
- University of Illinois at Urbana-Champaign, IL (United States); Beijing Institute of Technology (China)
- University of Illinois at Urbana-Champaign, IL (United States); Zhejiang University, Zhejiang (China)
- Publication Date:
- Research Org.:
- Univ. of Illinois at Urbana-Champaign, IL (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE); Tank and Automotive Research, Development, and Engineering Center (TARDEC)
- OSTI Identifier:
- 1977134
- Alternate Identifier(s):
- OSTI ID: 1825340
- Grant/Contract Number:
- EE0007309
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Fuel
- Additional Journal Information:
- Journal Volume: 307; Journal Issue: C; Journal ID: ISSN 0016-2361
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING; butanol-diesel blend; hexanol-diesel blend; flame lift-off length; reacting spray; soot
Citation Formats
Yan, Junhao, Gao, Suya, Zhao, Weihua, and Lee, Timothy H. Spray and combustion characteristics of butanol-diesel and hexanol-diesel blends under high-altitude conditions. United States: N. p., 2021.
Web. doi:10.1016/j.fuel.2021.121753.
Yan, Junhao, Gao, Suya, Zhao, Weihua, & Lee, Timothy H. Spray and combustion characteristics of butanol-diesel and hexanol-diesel blends under high-altitude conditions. United States. https://doi.org/10.1016/j.fuel.2021.121753
Yan, Junhao, Gao, Suya, Zhao, Weihua, and Lee, Timothy H. Fri .
"Spray and combustion characteristics of butanol-diesel and hexanol-diesel blends under high-altitude conditions". United States. https://doi.org/10.1016/j.fuel.2021.121753. https://www.osti.gov/servlets/purl/1977134.
@article{osti_1977134,
title = {Spray and combustion characteristics of butanol-diesel and hexanol-diesel blends under high-altitude conditions},
author = {Yan, Junhao and Gao, Suya and Zhao, Weihua and Lee, Timothy H.},
abstractNote = {Due to their excellent fuel properties, butanol and hexanol are considered as two promising renewable fuels for diesel engine applications. The objective of this work is to investigate and compare the spray and combustion characteristics of butanol-diesel and hexanol-diesel blends under high-altitude conditions. A constant volume combustion chamber was used to provide the desired environment. Experiments were conducted under various ambient temperatures ranging from 800 K to 1200 K and various ambient densities ranging from 11 kg/m3 to 15 kg/m3. Fuel blends with 20% blend ratio (B20 and H20) and neat diesel were used as test fuels. The spray and combustion characteristics of the test fuels were analyzed using measured liquid penetration length, ignition delay, combustion duration, flame lift-off length (FLoL), and spatially integrated natural luminosity (SINL). Here the results revealed that B20 and H20 had shorter liquid penetration length than diesel under low ambient temperature and density conditions due to their higher volatility. The blended fuels showed significantly longer ignition delay than diesel under low ambient temperature conditions, but it could be overcome by increasing the ambient temperature. Adding butanol and hexanol into diesel both extended FLoL especially under low ambient temperature and density conditions, but the effects of hexanol was less dramatic compared to butanol due to its lower latent heat of vaporization and higher chemical reactivity. Both B20 and H20 showed lower SINL than diesel under any conditions, indicating their ability of reducing soot emissions. However, no apparent differences could be found between these two fuels until the ambient temperature dropped to 800 K.},
doi = {10.1016/j.fuel.2021.121753},
journal = {Fuel},
number = C,
volume = 307,
place = {United States},
year = {Fri Sep 03 00:00:00 EDT 2021},
month = {Fri Sep 03 00:00:00 EDT 2021}
}
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