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Listar por palabra clave "Diesel spray"

Mostrando ítems 1-20 de 38

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A combined 1D3D CFD approach for reducing mesh dependency in Diesel spray calculations

García-Oliver, José M; Margot , Xandra; Chávez Cobo, Mariany de Jesús; Karlsson, A (PERGAMON-ELSEVIER SCIENCE LTD, 2011)

[EN] A 1D3D-CFD coupled spray model is proposed in this work for the simulation of Diesel sprays under non-evaporative conditions and constant injection velocity in time. The basic idea of the model is to reduce the poor ...
A computational analysis of local flow for reacting Diesel sprays by means of an Eulerian CFD model

Pandal-Blanco, Adrián; García-Oliver, José M; Novella Rosa, Ricardo; Pastor Enguídanos, José Manuel (Elsevier, 2018)

[EN] An implementation and validation of the coupled Sigma-gamma ADF model is presented in this work for reacting Diesel spray CFD simulations under a RANS turbulence modeling approach. An Approximated Diffusion Flamelet ...
A consistent, scalable model for Eulerian spray modeling

Pandal-Blanco, Adrián; Pastor Enguídanos, José Manuel; García Oliver, José María; Baldwin, E.; Schmidt, D.P. (Elsevier, 2016-07)

Despite great practical interest in how sprays emanate from fuel injectors, the near-nozzle region has remained a challenge for spray modelers. Recently, Eulerian models have shown promise in capturing the fast gas-liquid ...
A large-eddy simulation of diesel-like gas jets

Hoyas, S; Gil, A.; Mompó Laborda, Juan Manuel; Khuong ., Anh Dung (Inderscience, 2011)

[EN] Some aspects of the transient evolution of diesel-like gas jets by means of large-eddy simulation (LES) are discussed in this work. In order to understand the relationship between the inlet boundary condition and the ...
A numerical study of the effect of nozzle diameter on diesel combustion ignition and flame stabilization

Desantes Fernández, José Mª; García-Oliver, José M; Novella Rosa, Ricardo; Pachano-Prieto, Leonardo Manuel (SAGE Publications, 2020-01)

[EN] The role of nozzle diameter on diesel combustion is studied by performing computational fluid dynamics calculations of Spray A and Spray D from the Engine Combustion Network. These are well-characterized single-hole ...
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 ...
Adquisición y análisis de velocidad y tamaño de gotas de un espray Diesel mediante la técnica experimental Anemometría de Fase Doppler (PDA)

Muñoz Lacedón, Pedro (Universitat Politècnica de València, 2022-10-14)

[ES] El trabajo actual trata el estudio de un sistema de inyección diésel moderno common rail que funciona con alta presión y, en consecuencia, con una pulverización muy densa. En un motor real, el chorro no se puede ver ...
An experimental study of the effects of fuel properties on diesel spray processes using blends of single-component fuels

Vera-Tudela Fajardo, Walter Martin (Universitat Politècnica de València, 2015-12-16)

[EN] This last few years, the trend in diesel engines has been to use different kinds of fuels to identify their influence and behaviour on the emissions and performance. Among the wide variety of fuels employed are 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 ...
CFD modeling of combustion and soot production in Diesel sprays

Pachano Prieto, Leonardo Manuel (Universitat Politècnica de València, 2020-05-04)

[ES] En los últimos años, las emisiones de hollín provenientes de los motores de combustión interna han recibido más atención debido al impacto negativo que éstas tienen no solo en el ambiente, sino también en la salud del ...
Combination of Visualization Techniques for the Analysis of Evaporating Diesel Sprays

Payri, Raul; Salvador, F.J.; García Martínez, Antonio; Gil, A. (American Chemical Society, 2012-07)

[EN] Evaporating diesel sprays from three different multi-hole nozzles have been studied by means of three different and complementary techniques: Mie scattering, double-pass schlieren, and CH radical chemiluminescence. ...
COMBUSTION CONTROL OF DIESEL SPRAYS BY MEANS OF LASER INDUCED PLASMA IGNITION

Pinotti, Mattia (Universitat Politècnica de València, 2019-11-04)

[ES] En los últimos años, la investigación en motores se ha centrado principalmente en la reducción de emisiones contaminantes y en el aumento de la eficiencia. Muchos de los esfuerzos de investigación actuales en este ...
Determination of the optical depth of a DI diesel spray

Payri González, Francisco; Pastor, Jose V.; Payri, Raul; Manin, Julien Luc (Springer Verlag (Germany), 2011-06)

The optical depth is responsible of limiting the optical diagnostic using visible wavelength in the sprays. This paper proposes to measure the optical depth directly in a real Diesel spray through line-of-sight laser ...
Estimation of a suitable Schmidt number range in diesel sprays at high injection pressure

Salvador Rubio, Francisco Javier; Ruiz Rosales, Santiago; Gimeno, Jaime; De La Morena Borja, Joaquín (Elsevier, 2011-09)

The aim of this paper is to estimate a suitable range for the Schmidt number value in non-evaporative diesel sprays. For this purpose, mass distribution data obtained from X-ray absorption experiments existing in literature ...
ESTUDIO EXPERIMENTAL DE INYECCION-COMBUSTION DE CHORROS DIESEL EN ATMOSFERAS A ALTA PRESION Y ALTA TEMPERATURA

Arango Gómez, Jorge Eduardo (Universitat Politècnica de València, 2011-09-09)

Estudio experimental para toberas diesel mono orificio con diámetros de 70 y 90 micras, operando en atmosfera reactiva a condiciones controladas de presión, temperatura y concentración de oxigeno, donde inicialmente se ...
Estudio experimental y computacional del proceso de inyección diésel mediante un código CFD con malla adaptativa

Jaramillo Císcar, David (Universitat Politècnica de València, 2017-12-11)

One of the main aspects in the development of modern diesel engines has been the direct injection systems, due to its influence in the atomization and evaporation processes. The study of all physical and chemical phenomena ...
Eulerian CFD modeling of nozzle geometry effects on ECN Sprays A and D: assessment and analysis

Pandal, Adrián; García-Oliver, José M; Pastor Enguídanos, José Manuel (SAGE Publications, 2020-01)

[EN] Diesel spray modeling is a multi-scale problem with complex interactions between different flow regions, that is, internal nozzle flow, near-nozzle region and developed spray, including evaporation and combustion. ...
Evaluation of natural and tracer fluorescent emission methods for droplet size measurements in a diesel spray

Pastor Soriano, José Vicente; Payri, Raul; Salavert Fernandez, Javier; Manin, J. (Springer Verlag (Germany), 2012-08-01)

Spray sizing that records fluorescent emission and scattered light has been widely applied to spray diagnostics over the last two decades. Different experimental strategies have been developed, but comparing the different ...
Evaluation of the Thermal NO formation mechanism under low-temperature diesel combustion conditions

Desantes Fernández, José Mª; López, J. Javier; Redón Lurbe, Pau; Arregle, Jean Joseph Pierre (SAGE Publications (UK and US), 2012-12)

Over the past two decades, the amount of exhaust gas pollutants emissions has been significantly reduced due to the severe emission legislation imposed in most countries worldwide. Initial strategies simply required the ...
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 ...