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Effects of Fuel Quantity on Soot Formation Process for Biomass-Based Renewable Diesel Fuel Combustion

[+] Author Affiliations
Wei Jing, Zengyang Wu, Tiegang Fang

North Carolina State University, Raleigh, NC

William L. Roberts

King Abdullah University of Science and Technology, Thuwal, Saudi Arabia

Paper No. ICEF2016-9380, pp. V001T02A009; 7 pages
doi:10.1115/ICEF2016-9380
From:
  • ASME 2016 Internal Combustion Engine Division Fall Technical Conference
  • ASME 2016 Internal Combustion Engine Division Fall Technical Conference
  • Greenville, South Carolina, USA, October 9–12, 2016
  • Conference Sponsors: Internal Combustion Engine Division
  • ISBN: 978-0-7918-5050-3
  • Copyright © 2016 by ASME

abstract

Soot formation process was investigated for biomass-based renewable diesel fuel, such as biomass to liquid (BTL), and conventional diesel combustion under varied fuel quantities injected into a constant volume combustion chamber. Soot measurement was implemented by two-color pyrometry under quiescent type diesel engine conditions (1000 K and 21% O2 concentration). Different fuel quantities, which correspond to different injection widths from 0.5 ms to 2 ms under constant injection pressure (1000 bar), were used to simulate different loads in engines. For a given fuel, soot temperature and KL factor show a different trend at initial stage for different fuel quantities, where a higher soot temperature can be found in a small fuel quantity case but a higher KL factor is observed in a large fuel quantity case generally. Another difference occurs at the end of combustion due to the termination of fuel injection. Additionally, BTL flame has a lower soot temperature, especially under a larger fuel quantity (2 ms injection width). Meanwhile, average soot level is lower for BTL flame, especially under a lower fuel quantity (0.5 ms injection width). BTL shows an overall low sooting behavior with low soot temperature compared to diesel, however, trade-off between soot level and soot temperature needs to be carefully selected when different loads are used.

Copyright © 2016 by ASME
Topics: Combustion , Fuels , Biomass , Diesel , Soot

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