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Browsing by Author "Salvador Rubio, Francisco Javier"

Now showing items 21-40 of 105

Caracterización hidráulica del flujo en toberas diésel en condiciones de cavitación y análisis computacional mediante el código de cálculo Openfoam

Colomer Martínez, Marta (Universitat Politècnica de València, 2013-12-03)

Consulta en la Biblioteca ETSI Industriales (7918)
Cálculo CFD de la turbulencia en toberas de inyección mediante simulaciones les para su aplicación al cálculo de la atomización primaria mediante DNS

Lozano Antón, Alejandro (Universitat Politècnica de València, 2018-09-07)

El presente trabajo es un estudio del flujo interno de combustibles líquidos a su paso por la tobera de inyección de un inyector mediante técnicas CFD. Para llevarlo a cabo, se han seleccionado tres combustibles diferentes ...
Characterization of the pressure losses in a common rail diesel injector

López, J. Javier; Salvador Rubio, Francisco Javier; De La Garza De Leon, Oscar; Arregle, Jean Joseph Pierre (SAGE Publications (UK and US), 2012)

A methodology to characterise the pressure losses in quasi-steady conditions (i.e. at full needle lift) of common rail diesel injectors was developed. The aim was to quantify the error when experimental results of nozzle ...
Combination of Visualization Techniques for the Analysis of Evaporating Diesel Sprays

Payri, Raul; Salvador, F.J.; García Martínez, Antonio; Gil, A. (American Chemical Society, 2012-07)

[EN] Evaporating diesel sprays from three different multi-hole nozzles have been studied by means of three different and complementary techniques: Mie scattering, double-pass schlieren, and CH radical chemiluminescence. ...
Combustion analysis of a stratified pre-chamber ignition system by means of a zero-dimensional turbulence and flame speed model

Macian Martinez, Vicente; Salvador, Francisco Javier; De La Morena, Joaquín; Pagano, V. (Elsevier, 2021-10)

[EN] In the current work, the combustion process inside a stratified pre-chamber ignition system is analyzed. The pre-chamber is installed on a Rapid Compression-Expansion Machine (RCEM) and runs at different combinations ...
Comparative study of the internal flow in diesel injection nozzles at cavitating conditions at different needle lifts with steady and transient simulations approaches

Salvador, Francisco Javier; De La Morena, Joaquín; Crialesi Esposito, Marco; Martínez López, Jorge (SAGE Publications, 2018)

[EN] The motion of the needle during the injection process of a diesel injector has a marked influence on the internal flow, the fuel characteristics at the nozzle exit, the spray pattern and the fuel-air mixing process. ...
Comparison of different techniques for characterizing the diesel injector internal dimensions

Salvador, Francisco Javier; Gimeno, Jaime; De La Morena, Joaquín; Carreres, Marcos (Springer-Verlag, 2018)

[EN] The geometry of certain parts of diesel injectors is key to the injection, atomization and fuel-air mixing phenomena. Small variations on the geometrical parameters may have a strong influence on the aforementioned ...
Comparison of microsac and VCO diesel injector nozzles in terms of internal nozzle flow characteristics

Salvador Rubio, Francisco Javier; Carreres Talens, Marcos; Jaramillo Císcar, David; Martínez López, Jorge (Elsevier, 2015-10)

A computational study focused on the inner nozzle flow and cavitation phenomena has been reported in this paper in order to investigate the two most common types of diesel injector nozzles at the present: microsac and valve ...
Complete modelling of a piezo actuator last-generation injector for diesel injection systems

Salvador Rubio, Francisco Javier; Plazas Torres, Alejandro Hernán; Gimeno García, Jaime; Carreres Talens, Marcos (SAGE Publications (UK and US), 2014-01)

An experimental and computational study of an increasingly used third-generation common-rail injection system with a piezo actuator has been carried out. A complete characterization of the different elements of the system, ...
Computational assessment of temperature variations through calibrated orifices subjected to high pressure drops: application to diesel injection nozzles

Salvador, Francisco Javier; Carreres, Marcos; De La Morena, Joaquín; Martínez-Miracle-Muñoz, Enrique Carlos (Elsevier, 2018)

[EN] This paper conducts an investigation on the temperature variations experienced by the fuel when it expands through the calibrated orifices of a commercial diesel injector. Experimental results of the temperature change ...
Computational investigation of diesel nozzle internal flow during the complete injection event

Salvador, Francisco Javier; De La Morena, Joaquín; Bracho Leon, Gabriela; Jaramillo-Císcar, David (Springer-Verlag, 2018)

[EN] Currently, diesel engines are calibrated using more and more complex multiple injection strategies. Under these conditions, the characteristics of the flow exiting the fuel injector are strongly affected by the transient ...
Computational study of the cavitation phenomenon and its interaction with the turbulence developed in diesel injector nozzles by Large Eddy Simulation (LES)

Salvador Rubio, Francisco Javier; Martínez López, Jorge; Romero Bauset, José Vicente; Roselló Ferragud, María Dolores (Elsevier, 2013-04)

Firstly, the code has been validated at real operating diesel engine conditions with experimental data in terms of mass flow, momentum flux and effective velocity, showing that the model is able to predict with a high level ...
Computational study on the influence of nozzle eccentricity in spray formation by means of Eulerian Sigma-Y coupled simulations in diesel injection nozzles

Salvador, Francisco Javier; Pastor Enguídanos, José Manuel; De La Morena, Joaquín; Martínez-Miracle-Muñoz, Enrique Carlos (Elsevier, 2020-08)

[EN] The present work analyses the effect of the eccentricity of diesel nozzle orifices over the spray behaviour by means of CFD simulations. Several orifice geometries with varying horizontal eccentricity (from 0.50 to ...
Consequences of using biodiesel on the injection and air-fuel mixing processes in diesel engines

Salvador Rubio, Francisco Javier; Ruiz Rosales, Santiago; Salavert Fernández, José Miguel; De La Morena Borja, Joaquín (SAGE Publications (UK and US), 2013-08)

A study of the injection process and spray behaviour was made for three different fuels. In particular, blends of rapeseed methyl ester and standard diesel fuel with 5% and 30% biodiesel were used for the current study, ...
CUESTIONES Y PROBLEMAS RESUELTOS DE MOTORES DE COMBUSTIÓN DE FLUJO CONTINUO

López Sánchez, José Javier; Salvador Rubio, Francisco Javier; Martín Díaz, Jaime; Guardiola García, Carlos (Editorial Universitat Politècnica de València, 2015-11-09)

La presente obra, a través de cuestiones y problemas resueltos, aborda los fundamentos de las turbomáquinas, así como los ciclos y la tecnología de los motores de turbina de vapor, los de turbina de gas y los ciclos ...
CUESTIONES Y PROBLEMAS RESUELTOS DE MOTORES DE COMBUSTIÓN INTERNA ALTERNATIVOS

García Martínez, Antonio; Novella Rosa, Ricardo; López Sánchez, José Javier; Salvador Rubio, Francisco Javier (Editorial Universitat Politècnica de València, 2013-09-16)

El presente libro recoge cuestiones y problemas resueltos de Motores de Combustión Interna Alternativos (MCIA). Todo el material está ordenado en 9 capítulos diferentes, barriendo la inmensa mayoría de temas relacionados ...
Determination of critical operating and geometrical parameters in diesel injectors through one dimensional modelling, design of experiments and an analysis of variance

Salvador, Francisco Javier; Carreres, Marcos; Crialesi Esposito, Marco; Plazas Torres, Alejandro Hernán (SAGE Publications, 2018)

[EN] In this paper, a design of experiments and a statistical analysis of variance (ANOVA) are performed to determine the parameters that have more influence on the mass flow rate profile in diesel injectors. The study has ...
Development of a methodology to learn the characteristics and performances of common rail injection systems based on simulations with AMESim

Payri Marín, Raúl; López Sánchez, José Javier; Salvador Rubio, Francisco Javier; Martí Aldaraví, P. (Tempus Publications, 2013)

An injector model built with the platform LMS Imagine.Lab AMESim has been introduced as a useful tool used in one of the practical lessons taught in the Mixing formation and combustion systems in the Reciprocating Internal ...
Diesel ignition delay and lift-off length through different methodologies using a multi-hole injector

Payri, Raul; Salvador Rubio, Francisco Javier; Manin, Julien; Viera Sotillo, Alberto Antonio (Elsevier, 2016-01-15)

In this paper, lift-off length has been measured via both broadband luminosity and OH chemiluminescence. In addition, ignition delay has also been measured via broadband chemiluminescence and Schlieren imaging. A 3 orifice ...
Differences between single and double-pass schlieren imaging on diesel vapor spray characteristics

Payri, Raul; Salvador, Francisco Javier; Bracho Leon, Gabriela; Viera-Sotillo, Alberto Antonio (Elsevier, 2017-10)

[EN] The use olschlieren imaging at high acquisition rate has been adopted as a standard optical technique for the analysis of vaporizing diesel sprays under engine-like conditions. A single-pass schlieren arrangement is ...