Conference proceeding
The Effect of Chemical and Physical Fuel Properties on the Approval and Evaluation of Alternative Jet Fuels
U.S. National Combustion Meeting, 11 (03/24/2019–03/27/2019)
03/2019
Handle:
https://hdl.handle.net/2376/121790
Appears in Aviation Sustainability Center (ASCENT)
Abstract
The approval and evaluation process for alternative jet fuels is time, capital, and fuel volume intensive, namely due to the later tiered testing involved in the ASTM D4054 specifications. One method to reduce these expenses is to develop tools capable of capturing the variance in full-scale engine hardware performance with tests that require one hundred gallons of fuel or less. Towards this end, several low-dimensional modeling and experimental tools have been developed to predict and measure fuel operability limit variance. These operability limits, Lean Blowout, Cold Ignition, and Altitude Relight, have been measured with diverse hardware and test conditions. Here, these experimental results will be combined with engine rig performance results with similar fuels and conditions. A cross-experiment analysis shows that Lean Blowout limits are determined by either chemical or physical properties. Lean Blowout limits are well captured by the derived cetane number of a fuel and shock tube ignition delay for most of the tests. Cold Ignition, Altitude Relight, and Lean Blowout are all limited to first order by fuel physical properties, such as viscosity, surface tension, and density. Depending on the conditions, viscosity or surface tension appear to dominate break-up mechanisms. Combined, these low-order models only require test values from several hundred milliliters of fuel to account for approximately 90% of experimental variance across hundreds of data points, a dozen experimental configurations, and eleven fuels. If confirmed by others, these observations represent significant opportunities to reduce test requirements and costs for new alternative jet fuels.
Metrics
74 Record Views
Details
- Title
- The Effect of Chemical and Physical Fuel Properties on the Approval and Evaluation of Alternative Jet Fuels
- Creators
- Joshua Heyne (Author) - University of DaytonKatherine C. Opacich (Author)Erin E. Peiffer (Author) - University of DaytonMeredith Colket (Author)
- Conference
- U.S. National Combustion Meeting, 11 (03/24/2019–03/27/2019)
- Academic Unit
- Aviation Sustainability Center (ASCENT); Alternative Jet Fuel
- Grants
- 13-C-AJFE-UD-18, Federal Aviation Administration (United States, Washington) - FAA
- Identifiers
- 99900621893201842
- Language
- English
- Resource Type
- Conference proceeding