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Listar por palabra clave "Schlieren"

Mostrando ítems 1-17 de 17

An experimental analysis on the evolution of the transient tip penetration in reacting Diesel sprays

Desantes Fernández, José Mª; Pastor, José V.; García Oliver, José María; Briceño Sánchez, Francisco Javier (Elsevier, 2014-08)

Schlieren imaging has helped deeply characterize the behavior of Diesel spray when injected into an oxygen-free ambient. However, when considering the transient penetration of the reacting spray after autoignition, i.e. ...
Análisis numérico y experimental del fenómeno de thermal runaway en baterías de litio

García Tortosa, Jorge (Universitat Politècnica de València, 2021-10-20)

[ES] La producción de vehículos híbridos y eléctricos (HEV & BEV) ha experimentado un crecimiento exponencial los últimos años y se sitúan como la primera opción para sustituir en un futuro a corto plazo a los vehículos ...
APORTACIONES AL ESTUDIO DE LA EVOLUCIÓN TRANSITORIA DE LLAMAS DE DIFUSIÓN DIESEL

Briceño Sánchez, Francisco Javier (Universitat Politècnica de València, 2016-03-07)

[EN] Since the last two decades of the XX century and still nowadays the automotive industry has resorted to the very understanding of the combustion process. Regarding the Diesel engine many contributions has been built ...
Caracterización temporal mediante técnicas ópticas de chorro diésel provocado por inyecciones múltiples cercanas

Tortosa Serrano, Alejandro (Universitat Politècnica de València, 2018-09-10)

[ES] La necesidad de mejorar el rendimiento de los motores de combustión interna alternativos hace indispensable centrarse en uno de los parámetros más determinantes en cuanto a su funcionamiento: el proceso de inyección ...
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 ...
Diesel Spray Interaction in Multiple Injection Strategies under Evaporative Conditions

Abboud, Rami (Universitat Politècnica de València, 2021-10-20)

[ES] Los motores de combustión interna han sido testigos de un endurecimiento cada vez mayor de los límites en las emisiones y de las normativas de ahorro de combustible, lo que ha provocado que investigadores de todo el ...
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 ...
ECN Spray G External Spray Visualization and Spray Collapse Description through Penetration and Morphology Analysis

Payri, Raul; Salvador, Francisco Javier; Marti-Aldaravi, Pedro; Vaquerizo, Daniel (Elsevier, 2017-02-05)

[EN] Inside a DISI engine, a wide range of pressure and temperature conditions are possible, and with the current evolution of the systems, many of the conditions are subject to be encountered at the moment of injection. ...
Effect of multiple injection strategies on the Diesel spray formation and combustion using optical diagnostics

Viera Sotillo, Alberto Antonio (Universitat Politècnica de València, 2019-07-22)

[ES] En los últimos años, la evolución de las tecnologías de inyección ha permitido no solo mejorar el proceso de mezcla, sino también controlar con precisión los parámetros de inyección, agregando flexibilidad a los ...
Estudio teorico-experimental para la mejora del proceso de inyección en condiciones realistas de motor

Badenes Pérez, Sara (Universitat Politècnica de València, 2017-09-11)

Existe una tendencia actual consistente en incrementar la presión de inyección para la reducción de emisiones contaminantes. En el presente Trabajo Fin de Grado se ha desarrollado un estudio teórico-experimental acerca de ...
Experimental characterization of diesel ignition and lift-off length using a single-hole ECN injector

Benajes Calvo, Jesus Vicente; Payri Marín, Raúl; Bardi, Michele; Marti-Aldaravi, Pedro (Elsevier, 2013-09)

In this work, lift-off length and ignition delay have been measured via chemiluminescence techniques in a wide range of conditions for a single-hole injector from the Engine Combustion Network (ECN) dataset and using a ...
Experimental study of the injection conditions influence over n-dodecane and diesel sprays with two ECN single-hole nozzles. Part II: Reactive atmosphere

Payri, Raul; Salvador Rubio, Francisco Javier; Gimeno, Jaime; Peraza, Jesús E (Elsevier, 2016-10-15)

The second part of this experimental analysis, presented in this paper, seeks to go deep on the characterization of the Spray C and Spray D nozzles from the Engine Combustion Network, investigating the penetration of fuel ...
Spray characteristics and penetration of the human cough, and the effectiveness of masks to prevent its dispersion

Payri, Raul; Gimeno, Jaime; Marti-Aldaravi, Pedro; Marco-Gimeno, Javier (Elsevier, 2022-03-01)

[EN] Air-transmitted pathogens have become of particular interest for the general population during the COVID pandemic. Coughing is one of the most important spreading vector for air transmitted pathogens. To prevent and ...
Spray Characterization of Direct Hydrogen Injection as a Green Fuel with Lower Emissions

Payri, Raul; Novella Rosa, Ricardo; Nasser, Khodor I.; Bori-Fabra, Óscar (MDPI AG, 2024-05)

[EN] A viable green energy source for heavy industries and transportation is hydrogen. The internal combustion engine (ICE), when powered by hydrogen, offers an economical and adaptable way to quickly decarbonize the ...
Study of evaporative diesel spray interaction in multiple injections using optical diagnostics

Payri, Raul; Salvador, Francisco Javier; Abboud, Rami; Viera, Alberto (Elsevier, 2020-07-25)

[EN] Internal combustion engines have witnessed an ever increasing stringency in emission limits and fuel economy regulations that has continuously provoked researchers to develop complex strategies that enables engines ...
Study on Advanced Spray-Guided Gasoline Direct Injection Systems

Vaquerizo Sánchez, Daniel (Universitat Politècnica de València, 2018-03-22)

Resumen Los sistemas de inyección directa han sido uno de los principales puntos focales de la investigación en motores, particularmente en sistemas Diésel, donde la geometría interna, movimiento de aguja y comportamiento del ...
Vapor phase penetration measurements with both single and double-pass Schlieren for the same injection event

Payri, Raul; Salvador Rubio, Francisco Javier; Bracho León, Gabriela Cristina; Viera Sotillo, Alberto Antonio (Editorial Universitat Politècnica de València, 2017-07-28)

[EN] Schlieren imaging has been adopted as a standard optical technique for the analysis of diesel sprays under engine like conditions. A single-pass Schlieren arrangement is typically used for the study of single-orifice ...