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Listar por autor "Giraldo Valderrama, Jhoan Sebastián"

Mostrando ítems 1-10 de 10

A study on the relationship between internal nozzle geometry and injected mass distribution of eight ECN Spray G nozzles

Matusik, Katarzyna; Duke, Daniel; Sovis, Nicholas; Swantek, Andrew; Powell, Christopher; Payri, Raul; Vaquerizo, Daniel; Giraldo Valderrama, Jhoan Sebastián; Kastengren, Alan (Editorial Universitat Politècnica de València, 2017-07-28)

[EN] Gasoline direct injection (GDI) nozzles are manufactured to meet geometric specifications with length scales on the order of a few hundred microns. The machining tolerances of these nominal dimensions are not always ...
Computational and Experimental Investigation of Interfacial Area in Near-Field Diesel Spray Simulation

Pandal, A.; Pastor Enguídanos, José Manuel; Payri, Raul; Kastengren, Alan; Duke, Daniel J.; Matusik, Katarzyna E; GIRALDO-VALDERRAMA, JHOAN SEBASTIAN; Powell, Christopher F.; Schmidt, D. (SAE International, 2017)

[EN] The dense spray region in the near-field of diesel fuel injection remains an enigma. This region is difficult to interrogate with light in the visible range and difficult to model due to the rapid interaction between ...
Effect of high injection pressures and ambient gas properties over the macroscopic characteristics of the diesel spray on multi-hole nozzles

GIRALDO-VALDERRAMA, JHOAN SEBASTIAN; Payri, Raul; Marti-Aldaravi, Pedro; Montiel-Prieto, Tomas (Begell House Inc., 2018)

[EN] In this work, the effect of high injection pressures and ambient gas properties on diesel spray penetration and spreading angle are studied. To this end a multi-hole piezoelectric injector was used, and MIE-scattering ...
Effect of turbulent model closure and type of inlet boundary condition on a Large Eddy Simulation of a non-reacting jet with co-flow stream

Payri Marín, Raúl; López Sánchez, José Javier; Marti-Aldaravi, Pedro; Giraldo Valderrama, Jhoan Sebastián (Elsevier, 2016-10)

[EN] In this paper, the behavior and turbulence structure of a non-reacting jet with a co-flow stream is described by means of Large Eddy Simulations (LES) carried out with the computational tool OpenFoam. In order to study ...
Estudio del proceso de inyección en un inyector piezoeléctrico para motores diésel de automoción hasta 2700 bar

Quintana Esteve, Diego (Universitat Politècnica de València, 2016-10-21)

Consulta en la Biblioteca ETSI Industriales (Riunet)
Estudio LES del comportamiento de un chorro no reactivo con un co-flujo: Efecto del modelo SGS, tamaño de celda y condiciones de contorno

Giraldo Valderrama, Jhoan Sebastián (Universitat Politècnica de València, 2015-05-18)

[EN] The experiment of Cabra has been of great interest, because these kind of flames allow analysis of flame stabilization by a vitiated co-flow (like products of combustion). This phenomenon has been seen in several ...
Experimental and analytical study on vapor phase and liquid penetration for a high pressure diesel injector

Payri, Raul; Giraldo-Valderrama, Jhoan Sebastian; Ayyapureddi, S.; Versey, Z. (Elsevier, 2018-06-05)

[EN] In this study, a macroscopic characterization has been performed on a solenoid diesel injector (2200 bar-8 hole nozzle) under various non-reacting but evaporative conditions. For vapor penetration a two pass Schlieren ...
Experimental and Computational Investigation of Subcritical Near-Nozzle Spray Structure and Primary Atomization in the Engine Combustion Network Spray D

Battistoni, Michele; Magnotti, Gina M.; Genzale, Caroline L.; Arienti, Marco; Matusik, Katarzyna E.; Duke, Daniel J.; GIRALDO-VALDERRAMA, JHOAN SEBASTIAN; Ilavsky, Jan; Kastengren, Alan L.; Powell, Christopher F.; Marti-Aldaravi, Pedro (SAE International, 2018)

[EN] In order to improve understanding of the primary atomization process for diesel-like sprays, a collaborative experimental and computational study was focused on the near-nozzle spray structure for the Engine Combustion ...
Macroscopic and microscopic characterization of non-reacting diesel sprays at low and very high injection pressures

Giraldo Valderrama, Jhoan Sebastián (Universitat Politècnica de València, 2018-12-10)

En la exploración de nuevos métodos para el mejoramiento de la eficiencia y rendimiento del motor diésel, es claro que un gran esfuerzo debe estar enfocado en el proceso de inyección de combustible. La eficiencia de la ...
Methodology for Phase Doppler Anemometry Measurements on a Multi-Hole Diesel Injector

Payri, Raul; Gimeno, Jaime; Marti-Aldaravi, Pedro; GIRALDO-VALDERRAMA, JHOAN SEBASTIAN (Springer-Verlag, 2017)

[EN] In this paper, a methodology for Phase Doppler Anemometry (PDPA) measurements on a multi-hole diesel injector is developed. Several key considerations were taken into account in this methodology: The windows for PDPA ...