Investigation of Homogeneous Relaxation Model Parameters and their Implications for Gasoline Injectors

Saha, Kaushik; Som, Sibendu; Battistoni, Michele

doi:10.1615/AtomizSpr.2017016338

Title: Investigation of Homogeneous Relaxation Model Parameters and their Implications for Gasoline Injectors

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Abstract

Flash boiling is known to be a common phenomenon for gasoline direct injection (GDI) engine sprays. The Homogeneous Relaxation Model has been adopted in many recent numerical studies for predicting cavitation and flash boiling. The Homogeneous Relaxation Model is assessed in this study. Sensitivity analysis of the model parameters has been documented to infer the driving factors for the flash-boiling predictions. The model parameters have been varied over a range and the differences in predictions of the extent of flashing have been studied. Apart from flashing in the near nozzle regions, mild cavitation is also predicted inside the gasoline injectors. The variation in the predicted time scales through the model parameters for predicting these two different thermodynamic phenomena (cavitation, flash) have been elaborated in this study. Turbulence model effects have also been investigated by comparing predictions from the standard and Re-Normalization Group (RNG) k-ε turbulence models.

Authors:

Saha, Kaushik ^[1]; Som, Sibendu ^[2]; Battistoni, Michele ^[3]

Argonne National Lab. (ANL), Argonne, IL (United States)
Argonne National Lab. (ANL), Argonne, IL (United States). Energy Systems Division
Argonne National Lab. (ANL), Argonne, IL (United States). Energy Systems Division; Univ. of Perugia (Italy). Dept. of Engineering

Publication Date:: Sun Jan 01 00:00:00 EST 2017

Research Org.:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Org.:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)

OSTI Identifier:: 1433001

Grant/Contract Number:: AC02-06CH11357

Resource Type:: Accepted Manuscript

Journal Name:: Atomization and Sprays

Additional Journal Information:: Journal Volume: 27; Journal Issue: 4; Journal ID: ISSN 1044-5110

Publisher:: Begell House

Country of Publication:: United States

Language:: English

Subject:: 33 ADVANCED PROPULSION SYSTEMS; cavitation; degree of superheat; flash boiling; gasoline direct injection; spray structure

Citation Formats


                    Saha, Kaushik, Som, Sibendu, and Battistoni, Michele. Investigation of Homogeneous Relaxation Model Parameters and their Implications for Gasoline Injectors.  United States: N. p., 2017. 
Web.  doi:10.1615/AtomizSpr.2017016338.

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                    Saha, Kaushik, Som, Sibendu, & Battistoni, Michele. Investigation of Homogeneous Relaxation Model Parameters and their Implications for Gasoline Injectors.  United States.  https://doi.org/10.1615/AtomizSpr.2017016338

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                    Saha, Kaushik, Som, Sibendu, and Battistoni, Michele. Sun .  
"Investigation of Homogeneous Relaxation Model Parameters and their Implications for Gasoline Injectors".  United States.  https://doi.org/10.1615/AtomizSpr.2017016338.  https://www.osti.gov/servlets/purl/1433001.

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@article{osti_1433001,

  title        = {Investigation of Homogeneous Relaxation Model Parameters and their Implications for Gasoline Injectors},

  author       = {Saha, Kaushik and Som, Sibendu and Battistoni, Michele},

  abstractNote = {Flash boiling is known to be a common phenomenon for gasoline direct injection (GDI) engine sprays. The Homogeneous Relaxation Model has been adopted in many recent numerical studies for predicting cavitation and flash boiling. The Homogeneous Relaxation Model is assessed in this study. Sensitivity analysis of the model parameters has been documented to infer the driving factors for the flash-boiling predictions. The model parameters have been varied over a range and the differences in predictions of the extent of flashing have been studied. Apart from flashing in the near nozzle regions, mild cavitation is also predicted inside the gasoline injectors. The variation in the predicted time scales through the model parameters for predicting these two different thermodynamic phenomena (cavitation, flash) have been elaborated in this study. Turbulence model effects have also been investigated by comparing predictions from the standard and Re-Normalization Group (RNG) k-ε turbulence models.},

  doi          = {10.1615/AtomizSpr.2017016338},

  journal      = {Atomization and Sprays},

  number       = 4,

  volume       = 27,

  place        = {United States},

  year         = {Sun Jan 01 00:00:00 EST 2017},

  month        = {Sun Jan 01 00:00:00 EST 2017}

}

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