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Measurements of n-Heptane Liquid Length and Spray Cone Angle for Low-Temperature, Low-Density Conditions in an Optically Accessible Flow Vessel

[+] Author Affiliations
Jin Wang, Kemar C. James, Michael C. Maynard, Brian T. Fisher

University of Alabama, Tuscaloosa, AL

Paper No. ICEF2014-5477, pp. V001T03A007; 12 pages
doi:10.1115/ICEF2014-5477
From:
  • ASME 2014 Internal Combustion Engine Division Fall Technical Conference
  • Volume 1: Large Bore Engines; Fuels; Advanced Combustion; Emissions Control Systems
  • Columbus, Indiana, USA, October 19–22, 2014
  • Conference Sponsors: Internal Combustion Engine Division
  • ISBN: 978-0-7918-4616-2
  • Copyright © 2014 by ASME

abstract

The purpose of this study was to measure global properties of n-heptane sprays using high-speed spray visualization in a newly developed constant-pressure flow vessel. Liquid-phase fuel penetration distance and cone angle were determined for low-density and low-temperature ambient conditions, which are increasingly relevant due to the advent of early direct-injection low-temperature combustion. Results indicated that fuel sprays under these conditions do not behave as predicted by established models. Penetration distances increased steadily throughout and after injection, and liquid-phase fuel persisted long after end of injection. Results suggest that these sprays vaporize extremely slowly and could cause wall-wetting issues.

Copyright © 2014 by ASME

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