RiuNet UPV Home
:
Browsing by Subject

Search RiuNet

Browse

All of RiuNet

My Account

RiuNet Help

Admin. UPV

Browsing by Subject "Diesel spray"

Now showing items 21-38 of 38

Experimental Evaluation of the Best Approach for Diesel Spray Images Segmentation

Macian Martinez, Vicente; Payri, Raul; García Martínez, Antonio; Bardi ., Michele (Society for Experimental Mechanics, 2011)

[EN] In this article, two of the most used methods for diesel spray macroscopic characterization are presented; the first one is the likelihood ratio test method (LRT) and the second one is the Otsu's thresholding method ...
Fuel concentration in isothermal Diesel sprays through structured planar laser imaging measurements

Payri, Raul; Gimeno, Jaime; Marti-Aldaravi, Pedro; Manin, J. (ELSEVIER SCIENCE INC, 2012)

[EN] The mixing of isothermal liquid sprays in engine-like conditions has been investigated by applying the structured planar laser imaging technique to remove multiple light scattering. The intensity of the illumination ...
Implementación y evaluación de un modelo euleriano de atomización y dispersión para el modelado CFD de chorros Diesel

Pandal Blanco, Adrián (Universitat Politècnica de València, 2014-05-19)

[ES] Durante el periodo de docencia del Máster el investigador se ha dedicado al estudio del modelado CFD de chorros Diesel bajo las condiciones de funcionamiento que se dan en los motores Diesel de inyección directa y al ...
Implementation and Development of an Eulerian Spray Model for CFD simulations of diesel Sprays

Pandal Blanco, Adrián (Universitat Politècnica de València, 2016-09-01)

[EN] The main objective of this work is the modeling of diesel sprays under engine conditions, including the atomization, transport and evaporation processes pivotal in the diesel spray formation and its development. For ...
Influence of injector technology on injection and combustion development, Part 1: Hydraulic characterization

Payri Marín, Raúl; Salvador Rubio, Francisco Javier; Gimeno García, Jaime; Morena Borja, Joaquín de la (Elsevier, 2011-04)

An experimental study of two real multi-hole Diesel injectors is performed under current DI Diesel engine operating conditions. The aim of the investigation is to study the influence of injector technology on the flow at ...
LES Eulerian diffuse-interface modeling of fuel dense sprays near- and far-field

Desantes Fernández, José Mª; García-Oliver, José M; Pastor Enguídanos, José Manuel; Olmeda-Ramiro, Iván; Pandal, A.; Naud, B. (Elsevier, 2020-06)

[EN] Engine fuel spray modeling still remains a challenge, especially in the dense near-nozzle region. This region is difficult to experimentally access and also to model due to the complex and rapid liquid and gas ...
Measurements of droplet size in shear-driven atomization using ultra-small angle x-ray scattering

Kastengren, Alan; Ilavsky, J.; Viera-Sotillo, Juan Pablo; Payri, Raul; Duke, Daniel J.; Swantek, A.; Tilocco, F. Zak; Sovis, N.; Powell, Christopher F. (Elsevier, 2017-06)

[EN] Measurements of droplet size in optically-thick, non-evaporating, shear-driven sprays have been made using ultra-small angle x-ray scattering (USAXS). The sprays are produced by orifice-type nozzles coupled to diesel ...
Numerical simulation of primary atomization in diesel spray at low injection pressure

Salvador Rubio, Francisco Javier; Romero Bauset, José Vicente; Roselló Ferragud, María Dolores; Jaramillo-Císcar, David (Elsevier, 2016-01-01)

[EN] Atomization involves complex physical processes and gas liquid interaction. Primary atomization on diesel spray is not well understood due to the difficulties to perform experimental measurements in the near nozzle ...
On the relation between the external structure and the internal characteristics in the near-nozzle field of diesel sprays

Benajes, Jesús; Salvador, Francisco Javier; Carreres, M.; Jaramillo-Císcar, David (SAGE Publications, 2017)

[EN] In this paper, a high-resolution visualization technique has been used in combination with an extensively validated 0D model in order to relate the external structure of a diesel spray to the internal properties in ...
Optical investigations on Diesel spray dynamics and in-flame soot formation

Xuan, Tiemin (Universitat Politècnica de València, 2018-01-15)

En las últimas décadas ha avanzado mucho la comprensión científica sobre el proceso de combustión de los chorros diesel de inyección directa gracias al desarrollo de todo tipo de técnicas e instalaciones ópticas. Además, ...
Optical study on characteristics of non-reacting and reacting diesel spray with different strategies of split injection

Desantes, J.M.; García-Oliver, José M; García Martínez, Antonio; Xuan, Tiemin (SAGE Publications, 2019-08)

[EN] Even though studies on split-injection strategies have been published in recent years, there are still many remaining questions about how the first injection affects the mixing and combustion processes of the second ...
Optimización de la medición de la velocidad y el tamaño de las gotas en un chorro Diesel densa con un nuevo equipo PDPA

Degroote, Lars (Universitat Politècnica de València, 2022-02-14)

[ES] Para cumplir con las estrictas restricciones medioambientales a los motores Diesel en la actualidad y en un futuro próximo, los científicos e ingenieros persiguen la reducción de los contaminantes y las emisiones ...
Optimization of spray break-up CFD simulations by combining Sigma-Y Eulerian atomization model with a response surface methodology under diesel engine-like conditions (ECN Spray A)

Pandal-Blanco, Adrián; Payri, Raul; García-Oliver, José M; Pastor Enguídanos, José Manuel (Elsevier, 2017)

[EN] This work evaluates the performance of the Sigma-Y Eulerian atomization model at reproducing the internal structure of a diesel spray with a special focus on Sauter Mean Diameter (SMD) predictions. Modeling results ...
Scaling spray penetration at supersonic conditions through shockwave analysis

Salvador, Francisco Javier; De La Morena, Joaquín; Taghavifar, Hadi; Nemati, Arash (Elsevier, 2020-01-15)

[EN] In the current paper, an investigation of the supersonic flow effect on shockwave generation and diesel spray penetration scaling has been performed. For this purpose, spray visualization tests have been carried out ...
Spray droplet velocity characterization for convergent nozzles with three different diameters

Payri, Raul; Tormos, B.; Salvador, Francisco Javier; Araneo, L. (Elsevier, 2008-11)

[EN] The core of the present work consists of the phase-Doppler anemometry non-intrusive measurements performed at various points of diesel direct injection sprays in order to obtain the local speed of fuel droplets. The ...
Study of mass and momentum transfer in diesel sprays base on X-ray mass distribution measurements and on a theoretical derivation

Desantes, J.M.; Salvador Rubio, Francisco Javier; López, J. Javier; De La Morena, Joaquín (Springer Verlag (Germany), 2011-02)

[EN] In this paper, a research aimed at quantifying mass and momentum transfer in the near-nozzle field of diesel sprays injected into stagnant ambient air is reported. The study combines X-ray measurements for two different ...
The role of detailed chemical kinetics on CFD diesel spray ignition and combustion modelling

Novella Rosa, Ricardo; García Martínez, Antonio; Pastor Enguídanos, José Manuel; Domenech Llopis, Vicente (Elsevier, 2011-10)

Spray ignition and flame stabilisation in the frame of diesel-like combustion conditions combine fundamental and complex physical and chemical processes. In this work, a numerical investigation has been performed to evaluate ...
Velocity field analysis of the high density, high pressure diesel spray

Payri Marín, Raúl; Viera-Sotillo, Juan Pablo; Wang, Huan; Malbec, Louis-Marie (Elsevier, 2016-04)

In this study, particle image velocimetry (PIV) measurements have been performed extensively on a non-reactive dense diesel spray injected from a single orifice injector, under various injection pressure and steady ambient ...