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Listar por palabra clave "Nozzle"

Mostrando ítems 1-20 de 28

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A computational investigation on the influence of the use of elliptical orifices on the inner nozzle flow and cavitation development in diesel injector nozzles

Molina, Santiago; Salvador Rubio, Francisco Javier; Carreres Talens, Marcos; Jaramillo, D. (Elsevier, 2014-03)

In this paper a computational study was carried out in order to investigate the influence of the use of elliptical orifices on the inner nozzle flow and cavitation development. With this aim, a large number of injection ...
A contribution to the understanding of cavitation effects in Diesel injector nozzles through a combined experimental and computational investigation

Payri González, Francisco; Payri, Raul; Salvador Rubio, Francisco Javier; Martínez López, Jorge (Elsevier, 2012-04-15)

In this paper a combined experimental and computational study was carried out in order to assess the ability of a homogeneous equilibrium model in predicting the experimental behaviour observed from the hydraulical ...
A Detailed Properties Comparison of an Automotive Sealant Nozzle Produced Using Three Metal Additive Manufacturing Technologies

Ortiz-Cañavate, Jaime; Ferrándiz Bou, Santiago; Bloem, Carlos A.; Igual, Javier; Blasco, Jose Ramon (MDPI AG, 2024-08)

[EN] Choosing the right metal AM equipment and material is a highly intricate process that forms a crucial part of every manufacturing company's strategic plan. This study undertakes a comprehensive comparison of the ...
A new approach to compute temperature in a liquid-gas mixture. Application to study the effect of wall nozzle temperature on a Diesel injector

Payri, Raul; Gimeno, Jaime; Marti-Aldaravi, Pedro; Alarcón-Herrera, Mary Yilbary (Elsevier, 2017)

[EN] Thermal effects on internal combustion engines have been always a hot topic. Its effects also on the injection system are still under research. In this work, a homogeneous model called Eulerian Spray Atomization (ESA) ...
Acoplamiento de las características del flujo interno turbulento de una tobera a cálculos de la atomización primaria en chorro diesel mediante DNS

Crialesi Esposito, Marco (Universitat Politècnica de València, 2017-08-29)

The understanding of the combustion process in energy generation, both for stationary purpose or for propulsion, is becoming more and more demanding as the technology progress toward a cleaner combustion able to reduce the ...
Analysis of the combined effect of hydrogrinding process and inclination angle on hydraulic performance of diesel injection nozzles

Salvador Rubio, Francisco Javier; Carreres Talens, Marcos; Jaramillo Císcar, David; Martínez López, Jorge (Elsevier, 2015-11-15)

A computational study to investigate the influence of the orifices inclination and the rounding radius at the orifice inlet (consequence of the hydro-erosive grinding process applied after the orifices machining) over the ...
Análisis y optimización del propulsor de combustible sólido del SLS mediante CFD y Matlab

Martínez Matarredona, Alejandro (Universitat Politècnica de València, 2024-11-04)

[ES] El objetivo de este trabajo es optimizar el impulso especÍfico (Isp) de los propulsores de combustible sólido del sistema SLS (Space Launch System) para mejorar la eficiencia de estos y, por tanto, las prestaciones ...
Assessment of compressibility effects on internal nozzle flow in diesel injectors at very high injection pressures

Salvador, F.J.; De La Morena, Joaquín; Martínez López, Jorge; Jaramillo-Císcar, David (Elsevier, 2017)

[EN] Diesel fuel injection systems are being used at higher injection pressure conditions over time because of more stringent emissions requirements. Thus, the importance to properly take into account the fluid compressibility ...
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 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 ...
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 ...
Design and optimization of the nozzle geometry of a high pressure hydrogen injector

Vilanova Prieto, Gonzalo (Universitat Politècnica de València, 2022-10-13)

[EN] Hydrogen, a clean-burning fuel with one of the highest energy densities, is seen as the future fuel, not only for automobile applications but also to generate electricity. The use of hydrogen to power internal ...
Diseño de una boquilla de trompa con aplicación de la tecnología 3D

Clavijo Bravo, Carles (Universitat Politècnica de València, 2019-06-17)

[ES] El objetivo principal de este trabajo final de grado es de realizar un estudio sobre la boquilla de la trompa, para poder después realizar una adaptada a las necesidades requeridas por el usuario. Analizaremos la ...
Diseño e implementación de un motor cohete de combustible solido en un cohete sonda para Faraday Rocketry UPV

Murcia Segura, Roberto (Universitat Politècnica de València, 2022-09-23)

[ES] El objetivo de este TFG será el de, en colaboración con el proyecto de Generación Espontanea Faraday Rocketry UPV, diseñar y construir un motor cohete de combustible solido reutilizable que pueda llevar el prototipo ...
Effect of the inlet geometry on performance, surge margin and noise emission of an automotive turbocharger compressor

Galindo, José; Tiseira, Andrés Omar; Navarro, Roberto; Tarí, Daniel; Meano, Cesare Maria (Elsevier, 2017-01-05)

[EN] Centrifugal compressor performance at low mass flow rates has become an issue in the latest years due to engine downsizing and the increase of low-end torque request. The principal drawback of this operating region ...
Estudio del potencial de toberas convergentes-divergentes de inyectores diesel mediante cfd

Selma Miralles, Juan (Universitat Politècnica de València, 2017-09-11)

Las cada vez más severas normativas de emisiones hacen que sea necesario, entre otras medidas, el desarrollo de nuevos sistemas de inyección y modos de combustión. En lo que respecta a los sistemas de inyección, el elemento ...
Estudio mediante CFD de los efectos térmicos en el interior de las toberas de inyección y de la utilización de geometrías innovadoras sobre el comportamiento del chorro

Martínez-Miracle Muñoz, Enrique Carlos (Universitat Politècnica de València, 2019-10-29)

[ES] En los motores de combustión interna, el sistema de inyección representa una parte fundamental de la generación, tanto de la potencia y eficiencia energética, como en las emisiones contaminantes resultantes. Los ...
Experimental analysis on the influence of nozzle geometry over the dispersion of liquid n-dodecane sprays

Payri, Raul; Salvador, F.J.; Gimeno, Jaime; Viera-Sotillo, Juan Pablo (Frontiers Media SA, 2015)

[EN] Understanding and controlling mixing and combustion processes is fundamental in order to face the challenges set by the ever more demanding pollutant regulations and fuel consumption standards of direct injection ...
Experimental investigation of the effect of orifices inclination angle in multihole diesel injector nozzles. Part 2-Spray characteristics

Payri, Raul; Salvador, Francisco Javier; De La Morena, Joaquín; Pagano, Vincenzo (Elsevier, 2018)

[EN] Diesel spray development is a key research topic due to its impact on the combustion characteristics. On the current paper, the effect of the orifices inclination angle on the spray penetration characteristics is ...
Influence of biofuels on the internal flow in diesel injector nozzles

Salvador, F.J.; Martínez López, Jorge; Romero Bauset, José Vicente; Roselló, M.D. (Elsevier, 2011)

[EN] In this paper, the behavior of the internal nozzle flow of a standard diesel fuel has been compared against a biodiesel fuel (soybean oil) at cavitating and non-cavitating conditions, using a homogeneous equilibrium ...