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Listar por autor "Desantes Fernández, José María"

Mostrando ítems 1-20 de 62

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A comparison of diesel sprays CFD modeling approaches: DDM versus Sigma-Y Eulerian atomization model

Desantes Fernández, José Mª; García Oliver, José María; Pastor Enguídanos, José Manuel; Pandal-Blanco, Adrián (Begell House, 2016)

[EN] A comparison between the Σ-Y atomization model and a classical DDM approach has been carried out for diesel spray CFD simulations. The Σ-Y model, originally proposed by Vallet and Borghi (1999), is based on an Eulerian ...
A Comprehensive Study of Particle Size Distributions with the Use of PostInjection Strategies in DI Diesel Engines

Desantes, J.M.; Bermúdez, Vicente; García Martínez, Antonio; Linares Rodríguez, Waldemar Gregorio (Taylor & Francis, 2011)

[EN] Control strategies such as variations in injection pressure and timing have been used by researchers to reduce in-cylinder exhaust emissions and meet legislation standards. Postinjection has been studied for several ...
A modeling framework for predicting the effect of the operating conditions and component sizing on fuel cell degradation and performance for automotive applications

Desantes J.M.; Novella Rosa, Ricardo; Pla Moreno, Benjamín; López-Juárez, Marcos (Elsevier, 2022-07-01)

[EN] In this study, durability and performance prediction were integrated in the sizing process of the FC stack of a fuel cell range-extender (FCREx) vehicle together with the design of a dynamics-limited control strategy. ...
A new method to predict high and low-temperature ignition delays under transient thermodynamic conditions and its experimental validation using a Rapid Compression-Expansion Machine

Desantes Fernández, José Mª; Bermúdez, Vicente; López, J. Javier; López Pintor, Darío (Elsevier, 2016-09-01)

A new procedure to predict both high-temperature stage and cool flames ignition delays under transient thermodynamic conditions has been developed in this paper. The results obtained have been compared with those obtained ...
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 phenomenological explanation of the autoignition propagation under HCCI conditions

Desantes, J.M.; López, J. Javier; García-Oliver, José M; López-Pintor, Darío (Elsevier, 2017)

[EN] A phenomenological explanation about the autoignition propagation under HCCI conditions is developed in this paper. To do so, diffusive effects from the burned zones to the fresh mixture, pressure waves based effects ...
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 ...
A study on tip penetration velocity and radial expansion of reacting diesel sprays with different fuels

Desantes J.M.; García-Oliver, José M.; Xuan, Tiemin; Vera-Tudela-Fajardo, Walter Martin (Elsevier, 2017)

[EN] The reacting diesel spray structure was investigated using n-dodecane, n-heptane and one binary blend of Primary Reference Fuels (80% n-heptane and 20% iso-octane in mass) based on the existing database from previous ...
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. ...
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 ...
Aportaciones al estudio del proceso de combustión turbulenta de chorros en motores diesel de inyección directa

García Oliver, José María (Universitat Politècnica de València, 2015-09-28)

El objetivo global de esta tesis está encaminado a la construcción de las herramientas conceptuales necesarias para analizar de forma sencilla los mecanismos físicos que gobiernan el proceso de combustión de los chorros ...
Application of a flamelet-based CFD combustion model to the LES simulation of a diesel-like reacting spray

Desantes, J.M.; García-Oliver, José M; Novella Rosa, Ricardo; Pérez-Sánchez, E.J. (Elsevier, 2020-03-30)

[EN] Spray A from ECN, representative of diesel-like sprays, is modelled in the frame of Large-Eddy Simulations (LES) with a Dynamic Structure (DS) turbulence model in conjunction with an Unsteady Flamelet Progress Variable ...
Application of an unsteady flamelet model in a RANS framework for spray A simulation

Desantes, J.M.; García-Oliver, José M.; Novella Rosa, Ricardo; Pérez-Sánchez, Eduardo Javier (Elsevier, 2017)

[EN] In the present investigation the Spray A reference configuration defined in the framework of the Engine Combustion Network (ECN) has been modeled by means of an Unsteady Flamelet Model (USFM) including detailed ...
Characterization and prediction of the discharge coefficient of non-cavitating diesel injection nozzles

Desantes Fernández, José Mª; López, J. Javier; Carreres Talens, Marcos; López-Pintor, Darío (Elsevier, 2016-11-15)

An experimental and theoretical study about the characterization of the discharge coefficient of diesel injection nozzles under non-cavitating conditions is presented in this paper. A theoretical development based on the ...
Comparative global warming impact and NOx emissions of conventional and hydrogen automotive propulsion systems

Desantes J.M.; Molina, Santiago; Novella Rosa, Ricardo; López-Juárez, Marcos (Elsevier, 2020-10-01)

[EN] With the rise of cleaner technologies for transport and the emergence of H-2 as a fuel, most of the emissions in the well-to-wheel process are shifting towards the energy carrier production (fuel or electricity). The ...
Computational and experimental assessment of the heat transfer in a refrigerated nacelle for the protection of a laser probe subjected to high temperature subsonic Flow

Lasala Aza, Ignacio (Universitat Politècnica de València, 2023-07-07)

[EN] The use of velocimetry techniques in high-temperature supersonic flows presents several difficulties. Traditional methods such as Particle Image Velocimetry (PIV) become unfeasible due to the high velocities experienced, ...
Correlations for the ignition characteristics of six different fuels and their application to predict ignition delays under transient thermodynami conditions

Desantes, J.M.; Bermúdez, Vicente; López, J. Javier; López-Pintor, Darío (Elsevier, 2017)

[EN] The ignition characteristics of six different fuels have been correlated as a function of the temperature, pressure, equivalence ratio and oxygen molar fraction in this investigation. More specifically, the ignition ...
Coupled/decoupled spray simulation comparison of the ECN spray a condition with the Sigma-Y Eulerian atomization model

Desantes Fernández, José Mª; García Oliver, José María; Pastor Enguídanos, José Manuel; Pandal-Blanco, Adrián; Baldwin, E.; Schmidt, D. P. (Elsevier, 2016-04)

This work evaluates the performance of the Σ-Y Eulerian atomization model at reproducing the internal structure of a diesel spray in the near- field. In the study, three different computational domains have been used ...
Dependencia del flujo secundario con la longitud del dominio en un conducto cuadrado turbulento

Peñarrubia Morcillo, Diego (Universitat Politècnica de València, 2019-09-12)

[ES] La metodología de este trabajo consiste en llevar a cabo un experimento numérico en el que la longitud del dominio periódico de un conducto de sección transversal cuadrada con flujo turbulento es reducido de manera ...
Derivation of the method of characteristics for the fluid dynamic solution of flow advection along porous wall channels

Desantes Fernández, José Mª; Serrano Cruz, José Ramón; Arnau Martínez, Francisco José; Piqueras Cabrera, Pedro (Elsevier, 2012-07)

This paper describes in detail a novel formulation of the method of characteristics for its application to solve one-dimensional compressible unsteady non-homentropic flow advected along porous wall channels. In particular, ...