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Listar por palabra clave "Atomization"

Mostrando ítems 1-20 de 47

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A Comprehensive Predictive Model to Predict Droplets Size Distribution in Pressure Swirl Atomizer

Jafari, Sajad; Kebriaee, Azadeh; Sohrabi, Shahin (Editorial Universitat Politècnica de València, 2017-07-28)

[EN] A predictive model is proposed to determine the droplet size and velocity distribution at the beginning of the secondary breakup. Liquid bulk is subjected to three stages of atomization including flow inside the ...
A recent eulerian langrarian CFD methodology for modeling direct injection diesel sprays

Desantes Fernández, José Mª; Hoyas Calvo, Sergio; Gil Megías, Antonio; Khuong, Anh Dung; Ravet, Frederic (World Scientific Publishing, 2014-06)

[EN] The global objective of this work is to show the capabilities of the Eulerian Lagrangian spray atomization (ELSA) model for the simulation of Diesel sprays in cold starting con- ditions. Our main topic is to focus ...
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 diesel spray atomization by means of a near-nozzle field visualization technique

Payri Marín, Raúl; Salvador Rubio, Francisco Javier; Gimeno García, Jaime; De La Morena Borja, Joaquín (Begell House, 2011)

[EN] In this paper, a high-resolution visualization technique has been used in order to characterize Diesel spray structure in the near-nozzle field. For this purpose, three conical nozzles with different diameters have ...
Analysis on the efects of turbulent inflow conditions on spray primary atomization in the near-field by direct numerical simulation

Salvador, Francisco Javier; Ruiz, S.; Crialesi Esposito, Marco; Blanquer Espert, Ignacio (Elsevier, 2018)

[EN] It is widely acknowledged that the development of sprays in the near-field is of primary importance for the spray formation downstream, as it affects both the spray angle, as well as the intact core length. In this ...
Análisis de las tecnologías para el desarrollo de nuevas aleaciones de alta entropía para aplicaciones aeronáuticas y biomédicas

Espín Fernández, Pedro José (Universitat Politècnica de València, 2021-03-08)

[ES] Existe un gran interés por las nuevas aleaciones de alta entropía, las cuales año a año se hacen nuevas investigaciones con resultados muy prometedores para el ámbito de la biomédica y la industria aeroespacial, ...
Atomization of Microfibrillated Cellulose and Its Incorporation into Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) by Reactive Extrusion

Vieira-De Freitas, Pedro Augusto; Barrasa, Hector; Vargas, Fátima; Rivera, Daniel; Vargas, Maria; Torres-Giner, S. (MDPI AG, 2022-02)

[EN] The present study focuses on the preparation and characterization of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) films that were reinforced with cellulose microstructures to obtain new green composite materials ...
CFD simulations of the diesel jet primary atomization from a multihole injector

Chasos, Charalambos (Editorial Universitat Politècnica de València, 2017-07-28)

[EN] High pressure multi-hole diesel injectors are currently used in direct-injection common-rail diesel engines for the improvement of fuel injection and air/fuel mixing, and the overall engine performance. The resulting ...
CFD study of air flow patterns and droplet trajectories in a lab scale vortex chamber spray dryer

Jamil Ur Rahman, Umair; Baiazitov, Ilias; Pozarlik, Artur; Brem, Gerrit (Editorial Universitat Politècnica de València, 2018-09-07)

[EN] In order to develop an alternative spray drying technology, a high drying rate in a smaller volume must be achieved. In this paper, results of CFD study are presented, carried out to investigate the possibility of ...
Characterization of Liquid Impinging Jet Injector Sprays for Bi-Propellant Space Propulsion: Comparison of PDI and High-Magnification Shadowgraphy

Boust, Bastien; Michalski, Quentin; Claverie, Alain; Indiana, Clément; Bellenoue, Marc (Editorial Universitat Politècnica de València, 2017-07-28)

[EN] Impinging jet sprays are investigated in the reference case of like-doublet injector, for application to bi-propellant combustion. Green propellants are considered, namely ethanol as a fuel and hydrogen peroxide as ...
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 ...
Control of a dlphasic assited atomization flow with physical and droplet size measurements

Vázquez Natividad, Andrea (Universitat Politècnica de València, 2016-03-10)

A high-e ective combustion in the thrust chamber of a rocket engine is strongly dependant of the spray quality. Thus, in order to maximize the e ciency is important to understand and control the phenomena responsible for ...
Coupled study of the film and spray on a basic annular prefiming airblast atomizer

Gosselin, Valentin; Ferret, Bernard; Bazile, Rudy (Editorial Universitat Politècnica de València, 2017-07-28)

[EN] One way to increase efficiency and reduce pollution in transport and energetic domain is designing fuel injectors with better atomization. In this work, experiments were performed on a prefilming airblast atomizer ...
Desarrollo de un modelo computacional para el estudio simultáneo de flujo interno y atomización y mezcla del chorro diésel

Martí Gómez-Aldaraví, Pedro (Universitat Politècnica de València, 2013-03-09)

[ES] Se ha desarrollado un nuevo modelo computacional en OpenFOAM capaz de calcular el flujo interno (no cavitante) y el flujo externo (en condiciones correspondientes a elevados números de Reynolds y Weber) del proceso ...
Development and validation of a two-phase computational model for an alternative fire suppression agent

Shaparia, Nishit Rajeshkumar (Universitat Politècnica de València, 2020-12-19)

[ES] Halon1301 se ha utilizado como agente de extinción de incendios en sistemas activos de extinción de incendios en motores de aviones, APU (Unidad de potencia auxiliar) y protección contra incendios de carga durante más ...
DEVELOPMENT OF A COMPUTATIONAL MODEL FOR A SIMULTANEOUS SIMULATION OF INTERNAL FLOW AND SPRAY BREAK-UP OF THE DIESEL INJECTION PROCESS

Martí Gómez-Aldaraví, Pedro (Universitat Politècnica de València, 2014-10-30)

El proceso de atomización desde una vena o lámina líquida hasta multitud de gotas dispersas en un medio gaseoso ha sido un fenómeno de interés desde hace varias décadas, especialmente en el campo de los motores de combustión ...
Direct numerical simulation of an atomizing biodiesel jet: Impact of fuel properties on atomization characteristics

Ling, Yue; Legros, Guillaume; Popinet, Stéphane; Zaleski, Stéphane (Editorial Universitat Politècnica de València, 2017-07-28)

[EN] The utilization of biodiesel is an effective approach to reduce pollution from internal combustion engines and thus has attracted steadily increasing interest in the recent years. As the viscosity of biodiesel is ...
Droplet characterization of a pressure-swirl atomizer by means of high-fidelity modelling based on DNS simulations

Salvador, Francisco Javier; Marti-Aldaravi, Pedro; Lozano-Antón, Alejandro; Taghavifar, H.; Nemati, A. (Elsevier, 2024-02-15)

[EN] Liquid injection optimization is key to enhance the efficiency of many processes in a wide variety of fields. Combustion processes are one of the most challenging ones, due to the direct emissions and greenhouse ...
Effects of Injection Nozzle Geometry on Spray Characteristics for Direct Injection Diesel Engines

Tamaki, Nobushige; Harada, Takato (Editorial Universitat Politècnica de València, 2017-07-28)

[EN] The purpose of this study is to improve the spray characteristics of a direct injection Diesel nozzle. Spray atomization of the multi-hole atomization enhancement nozzle, which was invented in previous studies, is ...
Estudio CFD del proceso de inyección de UWS: atomización y mezcla

Flor Madueño, Gerson (Universitat Politècnica de València, 2021-09-28)

[ES] La regulación de emisiones de los motores de combustión interna alternativos, y las futuras, son y van a ser cada vez más restrictivas. Es por ello que los sistemas de post-tratamiento están siendo cada vez más ...