The Impact of the Infinite Liquid Diffusivity and the Diffusion Limit Droplet Heating Model on the Evaporation and Combustion Characteristics in a Diesel Spray

2000-01-0270

03/06/2000

Event
SAE 2000 World Congress
Authors Abstract
Content
The impact of two models representing two limiting cases of the droplet heat-up process, namely the infinite diffusivity (ID) and the diffusion limit (DL) model, on the evaporation, self-ignition and subsequent combustion in a diesel spray is investigated. The simulation results show that, as compared with the DL model, the ID model leads to an over-prediction of the length of the ignition delay period by about 20 %. This is attributed mainly to the under-prediction of the evaporated mass predicted in the case of the ID model, during the early stages after injection. Accordingly, the time evolution of the combustion processes in the case of the ID model is found to lag that predicted when the DL model is employed, by roughly 0.3 ms.
Meta TagsDetails
DOI
https://doi.org/10.4271/2000-01-0270
Pages
10
Citation
Al Omari, S., "The Impact of the Infinite Liquid Diffusivity and the Diffusion Limit Droplet Heating Model on the Evaporation and Combustion Characteristics in a Diesel Spray," SAE Technical Paper 2000-01-0270, 2000, https://doi.org/10.4271/2000-01-0270.
Additional Details
Publisher
Published
Mar 6, 2000
Product Code
2000-01-0270
Content Type
Technical Paper
Language
English