Evaluation of a non-equilibrium multi-component evaporation model for blended diesel/alcohol droplets

Ping Yi, Hongyuan Zhang, Suo Yang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A non-equilibrium Langmuir-Knudsen model for multi-component pure diesel and blended diesel/alcohol droplets is developed. This model takes into account most of the key processes during the droplet lifetime, including the finite heat conduction and limited mass diffusion inside the droplet, the differential diffusion in gas phase, and the non-equilibrium Langmuir-Knudsen evaporation law for multi-component droplets. The present model shows good agreements with experimental measurements for pure ethanol, diesel, and blended diesel/ethanol droplets. The non-equilibrium effects become significant when the initial droplet diameter is smaller than 20 μm, and these effects are enhanced with increasing ambient temperature and forced convection intensity. The non-equilibrium effects are more significant for the blended diesel/alcohol droplets than pure diesel, especially during the evaporation period of ethanol.

Original languageEnglish (US)
Title of host publicationAIAA Scitech 2020 Forum
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
Pages1-8
Number of pages8
ISBN (Print)9781624105951
DOIs
StatePublished - 2020
EventAIAA Scitech Forum, 2020 - Orlando, United States
Duration: Jan 6 2020Jan 10 2020

Publication series

NameAIAA Scitech 2020 Forum
Volume1 PartF

Conference

ConferenceAIAA Scitech Forum, 2020
CountryUnited States
CityOrlando
Period1/6/201/10/20

Bibliographical note

Funding Information:
S. Yang gratefully acknowledges the faculty start-up funding from the Department of Mechanical Engineering and College of Science and Engineering at the University of Minnesota. The authors gratefully acknowledge the computational resources from the Minnesota Supercomputing Institute (MSI).

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