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Browsing by Subject "Combustion"

Now showing items 1-20 of 76

A complete 0D thermodynamic predictive model for direct injection diesel engines

Payri González, Francisco; Olmeda, P.; Martín Díaz, Jaime; García Martínez, Antonio (Elsevier, 2011-06-01)

[EN] Ideal models provide the simplest way to reproduce internal combustion engine (ICE) cycles, but they usually do not represent with sufficient accuracy the actual behaviour of an ICE. A suitable alternative for research ...
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 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 ...
Adaptive determination of cut-off frequencies for filtering the in-cylinder pressure in diesel engines combustion analysis

Payri González, Francisco; Olmeda González, Pablo Cesar; Guardiola García, Carlos; Martín Díaz, Jaime (Elsevier, 2011-10)

[EN] In-cylinder pressure analysis is a key tool for engine research and diagnosis and it has been object of study from the beginning of the internal combustion engines. One of its most useful application is combustion ...
An experimental investigation on the influence of piston bowl geometry on RCCI performance and emissions in a heavy-duty engine

Benajes Calvo, Jesus Vicente; Pastor Soriano, José Vicente; García Martínez, Antonio; Monsalve Serrano, Javier (Elsevier, 2015-10)

This experimental work investigates the effects of piston bowl geometry on RCCI performance and emissions at low, medium and high engine loads. For this purpose three different piston bowl geometries with compression ratio ...
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 ...
An on-engine method for dynamic characterisation of NOx concentration sensors

Galindo, José; Serrano Cruz, José Ramón; Guardiola, Carlos; Blanco-Rodriguez, David; Cuadrado, I.G. (Elsevier, 2011-04)

An on-engine method for dynamic characterisation of automotive NOx concentration sensors is presented. Steps in start of injection on a diesel engine are employed to achieve step-like NOx concentration variations on exhaust ...
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 combustión en un quemador de turbina de gas mediante la aplicación del modelado CFD

Gómez-Arias Mateos, Lorenzo Luis (Universitat Politècnica de València, 2021-10-13)

[ES] En este TFM se lleva a cabo el análisis de la combustión en un quemador de turbina de gas mediante la aplicación del modelado de la Dinámica de Fluidos Computacional (CFD). Dada la complejidad y coste económico que ...
Análisis de la interacción de los procesos de inyección y combustión con el campo de velocidad dentro del cilindro en motores de encendido por compresión

Pachano Prieto, Leonardo Manuel (Universitat Politècnica de València, 2017-07-27)

Emission legislation together with the need of more fuel-efficient engines have driven the development of promising combustion concepts in compression ignition (CI) engines. Most of them, lead toward a lean and low temperature ...
Análisis de los efectos del fuego en la cubierta del Salón Columnario de la Lonja (Valencia)

Pardo Goicoechea, Enrique (Universitat Politècnica de València, 2016-10-26)

[EN] The aim of this thesis research is the study of fire behavior against one of the landmarks of the city of Valencia, La Lonja de Valencia, also known as the Silk Exchange buildings. Therefore, in this thesis a state ...
Aplicación del modelado CFD para la cuantificación de la producción de hollín en motores de encendido por compresión

Lupini González, Gabriel Francisco (Universitat Politècnica de València, 2019-09-04)

[ES] La formación de hollín es un fenómeno que ocurre en gran parte de los procesos de combustión, siendo un precursor natural de las partículas sólidas emitidas a la atmósfera. Debido al acoplamiento entre procesos físicos ...
Aplicación y optimización de técnicas ópticas para el estudio de inyección y combustión de chorros diésel de inyección directa en MCIA

Pinotti, Mattia (Universitat Politècnica de València, 2015-07-27)

[EN] In this work is underlined the importance of the optical techniques in the mark of the investigation on internal combustion engines. The document reports an example of application of different optical techniques for ...
Application of a one-dimensional spray model to teach diffusion flame fundamentals for engineering students

García-Oliver, José M; García Martínez, Antonio; De La Morena, Joaquín; Monsalve-Serrano, Javier (John Wiley & Sons, 2019-09)

[EN] This study presents the application of an existing interactive application for teaching spray dynamics in engineering degrees. The model is based on spray momentum conservation and can be used to evaluate both fuel-air ...
Caracterización experimental mediante técnicas ópticas de sprays en combustión con mezclas de combustibles gasolina y diesel

Escobedo Carbonell, Pablo (Universitat Politècnica de València, 2017-09-05)

Sprays injected into an atmosphere with thermodynamic conditions similar to those occuring inside the cylinder of an internal combustion engine have been characterized motor of ignition for the compression for the automotive ...
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 Homogeneity with Partially Premixed Combustion a Light Duty Optical Engine

Pérez Monteagudo, Ana (Universitat Politècnica de València, 2016-11-15)

Consulta en la Biblioteca ETSI Industriales (Riunet)
Conjugate heat transfer study of the impact of "thermo-swing" coatings on internal combustion engines heat losses

Broatch, A.; Olmeda, P.; Xandra-Marcelle, Margot; Escalona-Cornejo, Johan Enrique (SAGE Publications, 2021-09-01)

[EN] To comply with the very strict emissions regulation the automotive industry is succeeding in developing ever more efficient engines, and there is scope for more improvements. In this regard, some investigations have ...
Contribution to the study of combustion noise of automotive Diesel engines

Monelletta, Luca (Universitat Politècnica de València, 2011-05-27)

Despite their important advantages in terms of fuel consumption in comparison with gasoline engines, for a long time the characteristic impulsive combustion noise has been one of the main causes why customers are reluctant ...
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 ...