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Modeling Flash Breakup for a Direct-Injection Spark-Ignition Gasoline Engine

Title
Modeling Flash Breakup for a Direct-Injection Spark-Ignition Gasoline Engine
Author
박성욱
Issue Date
2017-03
Publisher
SAE International
Citation
SAE Technical Paper
Abstract
An important challenge for modeling Direct-Injection Spark-Ignition (DISI) gasoline engines is understanding flash boiling spray. Flash boiling occurs when the ambient pressure is lower than the vapor pressure of the fuel and affects the spray structure and mixture formation process inside an engine. Gasoline is a multi-component fuel and the effects of each component on flash boiling are difficult to estimate. As a preliminary study to investigate the mixture formation process of the flash boiling spray, a single-component fuel was used to validate the flash breakup model. The flash breakup model was applied to KIVA 3V release2. Bubble growth in the drop was modelled by the Rayleigh-Plesset equation. When bubbles grow to satisfy the breakup criterion, breakup occurs and induces a smaller SMD for flash breakup cases. To investigate flash breakup modeling, simulations without the flash breakup model and with the flash breakup model was compared. Also, the modeling parameters were adjusted to obtain better results in order to more accurately reflect the experimental results.
URI
https://saemobilus.sae.org/content/2017-01-0548/http://repository.hanyang.ac.kr/handle/20.500.11754/113093
ISSN
0148-7191; 2688-3627
DOI
10.4271/2017-01-0548
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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