Influence of fuel properties on internal nozzle flow development in a multi-hole diesel injector
Abstract
Fuel physical properties are known to influence in-nozzle flow behavior, in turn affecting spray formation in internal combustion engines. A series of 3D simulations was performed to model the internal nozzle flow in a five-hole mini-sac diesel injector. The goal of the study was to evaluate the behavior of two gasoline-like fuels (full-range naphtha and light naphtha) and compare them against n-Dodecane, selected from a palette used as a diesel surrogate. Simulations were carried out using a multi-phase flow representation based on the mixture model assumption with the Volume of Fluid (VOF) method, and including cavitation effects by means of the Homogeneous Relaxation Model (HRM). Validated methodologies from our previous studies were employed to account for full needle motion. Detailed simulations revealed the influence of the fuel properties on injector performance, injected fuel energy and propensity to cavitation. The three fuels were compared with respect to global parameters such as mass flow rate and area contraction coefficients, and local parameters such as pressure and velocity distribution inside the sac and orifices. Parametric investigations were also performed to understand the fuel response to changes in the fuel injection temperature, injection pressure, and geometry details. Cavitation magnitude was observed to be stronglymore »
- Authors:
-
- Argonne National Lab. (ANL), Lemont, IL (United States)
- Aramco Services Co., Novi, MI (United States)
- Publication Date:
- Research Org.:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- Aramco Services Company; USDOE
- OSTI Identifier:
- 1413755
- Alternate Identifier(s):
- OSTI ID: 1415657
- Grant/Contract Number:
- AC02-06CH11357
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Fuel
- Additional Journal Information:
- Journal Volume: 204; Journal Issue: C; Journal ID: ISSN 0016-2361
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING; Cavitation; HRM; Internal Nozzle Flow; Naphtha; VOF; n-Dodecane
Citation Formats
Torelli, Roberto, Som, Sibendu, Pei, Yuanjiang, Zhang, Yu, and Traver, Michael. Influence of fuel properties on internal nozzle flow development in a multi-hole diesel injector. United States: N. p., 2017.
Web. doi:10.1016/j.fuel.2017.04.123.
Torelli, Roberto, Som, Sibendu, Pei, Yuanjiang, Zhang, Yu, & Traver, Michael. Influence of fuel properties on internal nozzle flow development in a multi-hole diesel injector. United States. https://doi.org/10.1016/j.fuel.2017.04.123
Torelli, Roberto, Som, Sibendu, Pei, Yuanjiang, Zhang, Yu, and Traver, Michael. Wed .
"Influence of fuel properties on internal nozzle flow development in a multi-hole diesel injector". United States. https://doi.org/10.1016/j.fuel.2017.04.123. https://www.osti.gov/servlets/purl/1413755.
@article{osti_1413755,
title = {Influence of fuel properties on internal nozzle flow development in a multi-hole diesel injector},
author = {Torelli, Roberto and Som, Sibendu and Pei, Yuanjiang and Zhang, Yu and Traver, Michael},
abstractNote = {Fuel physical properties are known to influence in-nozzle flow behavior, in turn affecting spray formation in internal combustion engines. A series of 3D simulations was performed to model the internal nozzle flow in a five-hole mini-sac diesel injector. The goal of the study was to evaluate the behavior of two gasoline-like fuels (full-range naphtha and light naphtha) and compare them against n-Dodecane, selected from a palette used as a diesel surrogate. Simulations were carried out using a multi-phase flow representation based on the mixture model assumption with the Volume of Fluid (VOF) method, and including cavitation effects by means of the Homogeneous Relaxation Model (HRM). Validated methodologies from our previous studies were employed to account for full needle motion. Detailed simulations revealed the influence of the fuel properties on injector performance, injected fuel energy and propensity to cavitation. The three fuels were compared with respect to global parameters such as mass flow rate and area contraction coefficients, and local parameters such as pressure and velocity distribution inside the sac and orifices. Parametric investigations were also performed to understand the fuel response to changes in the fuel injection temperature, injection pressure, and geometry details. Cavitation magnitude was observed to be strongly associated with the values of saturation pressure. Owing to their higher volatility, the two gasoline-like fuels were observed to cavitate more than n-Dodecane across all the investigated conditions. While at full needle lift cavitation was reduced for all fuels, during the injection transients the gasoline-like fuels showed more propensity to cavitate inside the orifice and seat regions. This is expected to have a profound influence on nozzle erosion. Although full-range and light naphtha have lower densities compared to n-Dodecane, owing to their lower viscosity, the mass flow rate differences between the naphtha fuels and n-Dodecane were small. In conclusion, the analysis of fuel energy content showed that the higher lower heating value (LHV) of light naphtha helped compensate for the slightly lower total delivered mass.},
doi = {10.1016/j.fuel.2017.04.123},
journal = {Fuel},
number = C,
volume = 204,
place = {United States},
year = {Wed May 31 00:00:00 EDT 2017},
month = {Wed May 31 00:00:00 EDT 2017}
}
Web of Science
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