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Listar por palabra clave "Diesel"

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1D energy, exergy, and performance assessment of turbocharged diesel/hydrogen RCCI engine at different levels of diesel, hydrogen, compressor pressure ratio, and combustion duration

Taghavifar, Hadi; Nemati, Arash; Salvador, Francisco Javier; De La Morena, Joaquín (Elsevier, 2021-06-18)

[EN] There is a growing concern about the feasibility of a new generation of internal combustion engines in a low-temperature and efficient way that can meet the emission regulations while maintaining the desirable power ...
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 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 computationally efficient Kalman filter based estimator for updating look-up tables applied to NOx estimation in diesel engines

Guardiola, Carlos; Plá Moreno, Benjamín; Blanco-Rodriguez, David; Eriksson, L. (International Federation of Automatic Control (IFAC), 2013-11)

No-x estimation in diesel engines is an up-to-date problem but still some issues need to be solved. Raw sensor signals are not fast enough for real-time use while control-oriented models suffer from drift and aging. A ...
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 fluid dynamic model for unsteady compressible flow in wall-flow diesel particulate filters

Torregrosa Huguet, Antonio José; Serrano Cruz, José Ramón; Arnau Martínez, Francisco José; Piqueras Cabrera, Pedro (Elsevier, 2011-01)

The use of particulate filters (DPF) in Diesel engines has become in recent years the standard technology for the control of soot aerosol emissions. Once emissions reduction through the management of filtration and ...
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) ...
A quantitative analysis of nozzle surface bound fuel for diesel injectors

Turner, Jack; Sykes, Dan; De Sercey, Guillaume; Stetsyuk, Viacheslav; Gold, Martin; Pearson, Richard; Crua, Cyril (Editorial Universitat Politècnica de València, 2017-07-28)

[EN] In a fuel injector at the end of the injection, the needle descent and the rapid pressure drop in the nozzle leads to discharge of large, slow-moving liquid structures. This unwanted discharge is often referred as ...
A study on the needle lift influence over spray development for a prototype diesel direct acting piezoelectric injector

Viera Sotillo, Juan Pablo (Universitat Politècnica de València, 2014-05-19)

[ES] sta investigación consite en un estudio experimental para observar el desempeño hidráulico y evaporativo del inyector bajo distintas condiciones de levantamiento de aguja y varios perfiles de levantamiento. Se presentan ...
A Technique to Match the Refractive Index of Different Diesel Fuels with the Refractive Index of Transparent Materials to Improve the Experimental Visualization

Payri, Raul; Salvador Rubio, Francisco Javier; Gimeno, Jaime; Venegas Pereira, Óscar Hernando (Springer Verlag (Germany), 2016-02)

In this article a technique to match the refractive index (n) of different diesel fuels with the refractive index of transparent materials is presented with the aim to improve the flow visualization inside transparent ...
Acondicionamiento y análisis de la señal de medida del flujo de cantidad de movimiento usada en el estudio del chorro diesel

Lérida Sánchez de las Heras, Daniel (Universitat Politècnica de València, 2014-05-15)

Consulta en la Biblioteca ETSI Industriales (5403)
Ajuste y puesta en marcha de un modelo predictivo para el fenómeno de combustión Diesel basado en reactores estocásticos

Subies Martínez, Vicent (Universitat Politècnica de València, 2020-10-06)

[ES] Los fabricantes de motores, con la creciente demanda de ahorro de combustible y la reducción de las emisiones, todo esto conteniendo el precio final del producto, se han visto obligados a optimizar su método de ...
An Assessment of fuel physical and chemical properties in the combustion of a Diesel spray

Nerva, Jean-Guillaume (Universitat Politècnica de València, 2013-06-18)

With the slow but ineluctable depletion of fossil fuels, several avenues are currently being explored in order to define the strategic boundaries for a clean and sustainable energetic future, while accounting for the ...
An experimental study of gasoline effects on injection rate, momentum flux and spray characteristics using a common rail diesel injection system

Payri, Raul; García Martínez, Antonio; Domenech Llopis, Vicente; Durrett, Russell; Plazas, Alejandro H. (Elsevier, 2012-07)

A comparative study using diesel fuel and gasoline has been conducted focusing on the injection process. In this paper an experimental study has been carried out comparing the effects of the different fuels on the mass ...
Analysis of counterbore effect in five diesel common rail injectors

Payri, Raul; Hardy, Gilles; Gimeno, Jaime; Bautista-Rodríguez, Abián (Elsevier, 2019-10)

[EN] The present work assesses how the nozzle geometry, particularly the counterbore which is used in gasoline direct injection, could improve the fuel mixture when injecting in diesel engines, and ultimately, increase the ...
ANALYSIS OF MIXING PROCESSES IN LIQUID AND VAPORIZED DIESEL SPRAYS THROUGH LIF AND RAYLEIGH SCATTERING MEASUREMENTS

Manin ., Julien Luc (Universitat Politècnica de València, 2011-03-04)

Desde su introducción, los motores de combustión interna alternativos han sido desarrollados con el fin de reducir el consumo y mejorar el rendimiento y facilidad de conducción. Con el tiempo, la contaminación se ha ...
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 ...
Analysis of the Influence of Diesel Spray Injection on the Ignition and Soot Formation in Multiple Injection Strategy

Payri, Raul; García-Oliver, José M; Mendoza, Victor; Viera, Alberto (MDPI AG, 2020-07)

[EN] Multiple injection strategies have increased their capabilities along with the evolution of injection system technologies up to the point that nowadays it is possible to inject eight different pulses, permitting to ...
Análisis de la longitud de levantamiento de llama y retraso de encendido del chorro diésel mediante procesado de imágenes de radicales de hidroxilo (OH) emitidos durante la combustión

Pascual Aparisi, Antonio (Universitat Politècnica de València, 2021-01-12)

[ES] El presente proyecto se realiza en el laboratorio CMT Motores Térmicos ubicado en la Universidad Politécnica de Valencia. Tiene como objetivo el estudio de la inyección diésel variando diferentes parámetros como la ...
ANÁLISIS E IMPLANTACIÓN DE MEDIDAS PARA LA REDUCCIÓN DE LA HUELLA DE CARBONO EN UNA EMPRESA DISTRIBUIDORA DE COMBUSTIBLE

Bernat de Miguel, Francisco (Universitat Politècnica de València, 2020-12-09)

[ES] La participación de las empresas en la reducción de la huella de carbono y de sus impactos se ha demostrado necesaria para la consecución de los Objetivos de Desarrollo Sostenible de Naciones Unidas. El objetivo del ...