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Title: Model development for flash boiling spray and validations with isooctane, hexane, ethanol and their binary mixtures

Abstract

The objective of this study is to develop a comprehensive model for spray atomization under the consideration of flash boiling, which includes nucleation, bubble growth, and droplet breakup. Although flash boiling has been previously studied, there is still no well-established analytical and numerical model of their mechanisms, or general guidelines on the implementation of this atomization strategy. In this study, detailed formulations are elaborated for the unified spray atomization model under both non-flash and flash boiling conditions. Next, the model was implemented into CFD software and 3-D simulations were performed for model validations. Two fuel blends are tested: ethanol-isooctane blends and hexane-isooctane blends. Simulation results were compared with the experimental measurements conducted using two methodologies, DBI (Diffuse Backlight Imaging) system for spray images captured by a high-speed camera, and a PDA (Phase Doppler Anemometry) system for droplet size measurement during the spray injection process. It was found that the current flash boiling model can accurately capture the spray characteristics under different environment conditions, such as the spray plume interactions and liquid penetration. The averaged Sauter mean diameter (SMD) calculations match the measurement sufficiently well. The spray structures for both single- and multi-component fuels during the injection process are well representedmore » by current model.« less

Authors:
 [1];  [1];  [2];  [1]
+ Show Author Affiliations
  1. University of Illinois at Urbana-Champaign, IL (United States)
  2. Zhejiang University (China)
Publication Date:
Research Org.:
Univ. of Illinois at Urbana-Champaign, IL (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE); Tank and Automotive Research, Development, and Engineering Center (TARDEC),
OSTI Identifier:
1977138
Alternate Identifier(s):
OSTI ID: 2319248
Grant/Contract Number:  
EE0007309
Resource Type:
Accepted Manuscript
Journal Name:
Fuel
Additional Journal Information:
Journal Volume: 321; Journal Issue: C; Journal ID: ISSN 0016-2361
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; flash boiling spray; multi-component fuel; ethanol; atomization; CFD

Citation Formats

Gao, Suya, Yan, Junhao, Lee, Timothy H., and Lee, Chia-Fon. Model development for flash boiling spray and validations with isooctane, hexane, ethanol and their binary mixtures. United States: N. p., 2022. Web. doi:10.1016/j.fuel.2022.123917.
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Gao, Suya, Yan, Junhao, Lee, Timothy H., & Lee, Chia-Fon. Model development for flash boiling spray and validations with isooctane, hexane, ethanol and their binary mixtures. United States. https://doi.org/10.1016/j.fuel.2022.123917
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Gao, Suya, Yan, Junhao, Lee, Timothy H., and Lee, Chia-Fon. Mon . "Model development for flash boiling spray and validations with isooctane, hexane, ethanol and their binary mixtures". United States. https://doi.org/10.1016/j.fuel.2022.123917. https://www.osti.gov/servlets/purl/1977138.
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@article{osti_1977138,
title = {Model development for flash boiling spray and validations with isooctane, hexane, ethanol and their binary mixtures},
author = {Gao, Suya and Yan, Junhao and Lee, Timothy H. and Lee, Chia-Fon},
abstractNote = {The objective of this study is to develop a comprehensive model for spray atomization under the consideration of flash boiling, which includes nucleation, bubble growth, and droplet breakup. Although flash boiling has been previously studied, there is still no well-established analytical and numerical model of their mechanisms, or general guidelines on the implementation of this atomization strategy. In this study, detailed formulations are elaborated for the unified spray atomization model under both non-flash and flash boiling conditions. Next, the model was implemented into CFD software and 3-D simulations were performed for model validations. Two fuel blends are tested: ethanol-isooctane blends and hexane-isooctane blends. Simulation results were compared with the experimental measurements conducted using two methodologies, DBI (Diffuse Backlight Imaging) system for spray images captured by a high-speed camera, and a PDA (Phase Doppler Anemometry) system for droplet size measurement during the spray injection process. It was found that the current flash boiling model can accurately capture the spray characteristics under different environment conditions, such as the spray plume interactions and liquid penetration. The averaged Sauter mean diameter (SMD) calculations match the measurement sufficiently well. The spray structures for both single- and multi-component fuels during the injection process are well represented by current model.},
doi = {10.1016/j.fuel.2022.123917},
journal = {Fuel},
number = C,
volume = 321,
place = {United States},
year = {Mon Aug 01 00:00:00 EDT 2022},
month = {Mon Aug 01 00:00:00 EDT 2022}
}
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Journal Article:
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Publisher's Version of Record
https://doi.org/10.1016/j.fuel.2022.123917
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Works referenced in this record:

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