University of Sussex
Browse

Transcritical mixing of fuels at reactive conditions

Download (706.46 kB)
journal contribution
posted on 2023-11-29, 15:41 authored by Cyril CruaCyril Crua, Julien Manin, Scott Skeen, Lyle M Pickett

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 Series

ISSN

0148-7191

Publisher

Society of Automotive Engineers of Japan

Article number

2023-32-0117

Event name

2023 JSAE/SAE Powertrains, Energy and Lubricants International Meeting

Event location

Kyoto, Japan

Event type

conference

Event date

August 29 - September 1, 2023

Department affiliated with

  • Engineering and Design Publications

Institution

University of Sussex

Peer reviewed?

  • Yes