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

Journal Article · · Atomization and Sprays
 [1];  [2];  [3]
  1. Argonne National Lab. (ANL), Argonne, IL (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States). Energy Systems Division
  3. Argonne National Lab. (ANL), Argonne, IL (United States). Energy Systems Division; Univ. of Perugia (Italy). Dept. of Engineering
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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.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1433001
Journal Information:
Atomization and Sprays, Journal Name: Atomization and Sprays Journal Issue: 4 Vol. 27; ISSN 1044-5110
Publisher:
Begell HouseCopyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

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