Numerical Modeling of Flashing Sprays Using a Hybrid Breakup Model
Fuel droplets may undergo flash-boiling conditions when they are injected into a cylinder at higher than saturation temperature for the corresponding chamber pressure, resulting in a rapid evaporation. Such conditions lead to wider spray angles, finer droplets and shorter penetration. Based on curre...
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Online Access: | https://dergipark.org.tr/en/pub/ijastech/issue/39477/423293 |
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doaj-d4d3cb4ab2254d0b98a4c314fc0313e22021-02-08T21:24:55ZengTurkish Society of Automotive EngineersInternational Journal of Automotive Science and Technology2587-09632018-09-01231958Numerical Modeling of Flashing Sprays Using a Hybrid Breakup ModelAlvaro Dıez0Yağmur Güleç1Francesco Contıno2IZMIR INSTITUTE OF TECHNOLOGYİZMİR YÜKSEK TEKNOLOJİ ENSTİTÜSÜVrije Universitait BrusselFuel droplets may undergo flash-boiling conditions when they are injected into a cylinder at higher than saturation temperature for the corresponding chamber pressure, resulting in a rapid evaporation. Such conditions lead to wider spray angles, finer droplets and shorter penetration. Based on current experimental investigations, such conditions may promote a more homogeneous fuel-air mixture and a faster evaporation compared to traditional methods. This investigation presents a numerical study in OpenFOAM focusing on the modeling of gasoline direct injection sprays under flash and non-flash boiling conditions. The model was implemented in a scenario where already superheated and compressed fuel at 100 bar was injected into a chamber at a pressure lower than its saturation pressure at the corresponding temperature. A new hybrid breakup method has been implemented along with a momentum flux post-processing tool for the characterization of the initials conditions. It was found that better prediction accuracy in evaporation rate was obtained. Spray penetration was also better modeled for flash boiling conditions compared with traditional breakup models.https://dergipark.org.tr/en/pub/ijastech/issue/39477/423293spraymomentum fluxcfd |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Alvaro Dıez Yağmur Güleç Francesco Contıno |
spellingShingle |
Alvaro Dıez Yağmur Güleç Francesco Contıno Numerical Modeling of Flashing Sprays Using a Hybrid Breakup Model International Journal of Automotive Science and Technology spray momentum flux cfd |
author_facet |
Alvaro Dıez Yağmur Güleç Francesco Contıno |
author_sort |
Alvaro Dıez |
title |
Numerical Modeling of Flashing Sprays Using a Hybrid Breakup Model |
title_short |
Numerical Modeling of Flashing Sprays Using a Hybrid Breakup Model |
title_full |
Numerical Modeling of Flashing Sprays Using a Hybrid Breakup Model |
title_fullStr |
Numerical Modeling of Flashing Sprays Using a Hybrid Breakup Model |
title_full_unstemmed |
Numerical Modeling of Flashing Sprays Using a Hybrid Breakup Model |
title_sort |
numerical modeling of flashing sprays using a hybrid breakup model |
publisher |
Turkish Society of Automotive Engineers |
series |
International Journal of Automotive Science and Technology |
issn |
2587-0963 |
publishDate |
2018-09-01 |
description |
Fuel
droplets may undergo flash-boiling conditions when they are injected
into a cylinder at higher than saturation temperature for the
corresponding chamber pressure, resulting in a rapid evaporation.
Such conditions lead to wider spray angles, finer droplets and
shorter penetration. Based on current experimental investigations,
such conditions may promote a more homogeneous fuel-air mixture and a
faster evaporation compared to traditional methods.
This
investigation presents a numerical study in OpenFOAM focusing on the
modeling of gasoline direct injection sprays under flash and
non-flash boiling conditions. The model was implemented in a scenario
where already superheated and compressed fuel at 100 bar was injected
into a chamber at a pressure lower than its saturation pressure at
the corresponding temperature. A new hybrid breakup method has been
implemented along with a momentum flux post-processing tool for the
characterization of the initials conditions.
It was found that better
prediction accuracy in evaporation rate was obtained. Spray
penetration was also better modeled for flash boiling conditions
compared with traditional breakup models. |
topic |
spray momentum flux cfd |
url |
https://dergipark.org.tr/en/pub/ijastech/issue/39477/423293 |
work_keys_str_mv |
AT alvarodıez numericalmodelingofflashingspraysusingahybridbreakupmodel AT yagmurgulec numericalmodelingofflashingspraysusingahybridbreakupmodel AT francescocontıno numericalmodelingofflashingspraysusingahybridbreakupmodel |
_version_ |
1724279289690456064 |