Transcritical mixing of fuels at reactive conditions
Although progress has recently been made to characterise the transition of microscopic liquid fuel droplets from classical evaporation to a diffusive mixing regime, still little is known about the transition from one to the other under reactive conditions. The lack of experimental data for microscopic droplets at realistic operating conditions impedes the development of phenomenological and numerical models for droplet mixing, ignition, combustion and soot formation. In order to address this issue we performed systematic measurements using high- speed long-distance microscopy, for n-dodecane into gas at elevated temperatures (from 750 to 1,600 K) and pressures up to 13 MPa. We describe these high- speed visualizations at the microscopic level, including the time evolution of the liquid droplets, reaction wave, and soot distribution. Our measurements show that these parameters are influenced by the operating conditions (gas pressure, gas temperature, oxygen content) as well as the physical properties of the fuel.
History
Publication status
- Published
File Version
- Accepted version
Journal
SAE Technical Paper SeriesISSN
0148-7191Publisher
Society of Automotive Engineers of JapanPublisher URL
External DOI
Article number
2023-32-0117Event name
2023 JSAE/SAE Powertrains, Energy and Lubricants International MeetingEvent location
Kyoto, JapanEvent type
conferenceEvent date
August 29 - September 1, 2023Department affiliated with
- Engineering and Design Publications
Institution
University of SussexPeer reviewed?
- Yes