Numerical study on wall film formation and evaporation

Paper #:
  • 2014-01-1112

Published:
  • 2014-04-01
Citation:
Liu, H. and Lee, C., "Numerical study on wall film formation and evaporation," SAE Technical Paper 2014-01-1112, 2014, https://doi.org/10.4271/2014-01-1112.
Pages:
9
Abstract:
The numerical models presented in this study are established based on discrete phase model (DPM) of spray dispersion and evaporation considering the cold wall operating condition of port injection system. All the models were implemented into the CFD software FLUENT. Gas flow and film flow and spray are coupled by mass, momentum and energy transfer due to spray impingement, film evaporation and surface shear stress. Influences of impact parameters including injection height, injection duration and injection angle on the formation and evaporation of wall-film are discussed. The results show that, with the increase of injection height, the maximum film thickness and wall film ratio decrease, and fuel vapor mass ratio increases. The reductions of film thickness and wall film ratio are not obvious as the increasing of injection height. Extending the injection duration could add the maximum film thickness and film area. The wall film ratio is decreased and vapor mass ratio is increased with the injection duration. The difference of vaporized mass between different injection duration is reduced as time goes on. The wall-film length and areas increase with increasing injection angle, and that has appreciable impact on film evaporation.
Access
Now
SAE MOBILUS Subscriber? You may already have access.
Buy
Select
Price
List
Download
$28.00
Mail
$28.00
Members save up to 42% off list price.
Share
HTML for Linking to Page
Page URL

Related Items

Training / Education
1999-09-27
Event
2018-04-10
Technical Paper / Journal Article
2011-04-12
Training / Education
2018-04-18