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Browsing by UPV Unit "Universitat Politècnica de València. Departamento de Máquinas y Motores Térmicos - Departament de Màquines i Motors Tèrmics"

Now showing items 1-20 of 2268

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 ...
1D Modeling of strategies to improve the performance of gasoline, turbocharged, direct injection engines

González Domínguez, David (Universitat Politècnica de València, 2020-12-21)

[ES] Hoy en día, las empresas del sector de la automoción se encuentran en una atmósfera cada vez más competitiva, dado que su actividad está liderada por una combinación de reducción de costes, tecnología más compleja, ...
1D modelling of an ammonia inyector for compression ignition engines

Plazas García, Laura (Universitat Politècnica de València, 2024-11-05)

[ES] La creciente necesidad de soluciones energéticas sostenibles ha motivado la investigación de combustibles alternativos con menor impacto ambiental. Este Trabajo Final de Grado (TFG) se centra en la modelización 1D de ...
A bias correction method for fast fuel-to-air ratio estimation in diesel engines

Guardiola, Carlos; Plá Moreno, Benjamín; Blanco-Rodriguez, David; Mazer, Alexandre; Hayat, Olivier (SAGE Publications (UK and US), 2013-08)

l probes in turbocharged diesel engines are usually located downstream of the turbine, exhibiting a good dynamic response but a significant delay because of the exhaust line transport and the hardware itself. With the ...
A CFD STUDY OF CAVITATION IN REAL SIZE DIESEL INJECTORS

Patouna, Stavroula (Universitat Politècnica de València, 2012-02-17)

In Diesel engines, the internal flow characteristics in the fuel injection nozzles, such as the turbulence level and distribution, the cavitation pattern and the velocity profile affect significantly the air-fuel mixture ...
A Challenging Future for the IC Engine: New Technologies and the Control Role

F. Payri; Luján, José M.; Guardiola, Carlos; Plá Moreno, Benjamín (EDP Sciences, 2015)

[FR] Un challenge pour le futur du moteur a` combustion interne : nouvelles technologies et ro¿le du contro¿le moteur ¿ Les nouvelles normes sur les e¿missions, en particulier le CO2, pourraient re¿duire l¿utilisation ...
A Code for Simulating Heat Transfer in Turbulent Channel Flow

Lluesma-Rodríguez, Federico; Alcántara-Ávila, Francisco; Pérez Quiles, María Jezabel; Hoyas, S (MDPI AG, 2021-04-01)

[EN] One numerical method was designed to solve the time-dependent, three-dimensional, incompressible Navier-Stokes equations in turbulent thermal channel flows. Its originality lies in the use of several well-known methods ...
A Combination of Swirl Ratio and Injection Strategy to Increase Engine Efficiency

Olmeda, P.; Martín, J.; García Martínez, Antonio; Villalta-Lara, David; Warey, Alok; Domenech Llopis, Vicente (SAE International, 2017)

[EN] Growing awareness about CO2 emissions and their environmental implications are leading to an increase in the importance of thermal efficiency as criteria to design internal combustion engines (ICE). Heat transfer to ...
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 combustion phasing control-oriented model applied to an RCCI engine

Guardiola, Carlos; Pla Moreno, Benjamín; Bares-Moreno, Pau; Barbier, Alvin Richard Sebastien (Elsevier, 2018-09-22)

[EN] Low temperature combustions such as Reactivity Controlled Compression Ignition (RCCI) have been shown to be a promising way to reduce pollutants at the exhaust, i.e. NOx and soot emissions, and increase the thermal ...
A Comparative Study of Stochastic Model Predictive Controllers

Gonzalez, Edwin; Sanchís Saez, Javier; Garcia-Nieto, Sergio; Salcedo-Romero-de-Ávila, José-Vicente (MDPI AG, 2020-12)

[EN] A comparative study of two state-of-the-art stochastic model predictive controllers for linear systems with parametric and additive uncertainties is presented. On the one hand, Stochastic Model Predictive Control ...
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 methodology to analyse the Global Energy Balance in Reciprocating Internal Combustion Engines

Carreño Arango, Ricardo (Universitat Politècnica de València, 2016-11-02)

[EN] The main objective of this doctoral thesis is the development of a comprehensive methodology to perform and analyse the thermal balance of reciprocating engines, based on experimental and theoretical techniques. ...
A Comprehensive Modeling Toolchain for Particle Emissions in GDI Engines

Abboud, Rami (Universitat Politècnica de València, 2024-09-02)

[ES] La formación de hollín en los motores de inyección directa de gasolina se rige por complejas interacciones entre procesos físicos, que varían en función del modo de funcionamiento del motor. Con la aplicación de ...
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 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 computational analysis of the impact of bore-to-stroke ratio on emissions and efficiency of a HSDI engine

Benajes, Jesús; Novella Rosa, Ricardo; Pastor Enguídanos, José Manuel; Hernández-López, A.; Duverger, T. (Elsevier, 2017-11-01)

[EN] Research on combustion systems for Internal Combustion Engines (ICE) is guided by the necessity of improving engine efficiency while achieving the pollutant regulations. In this framework, this study identifies and ...
A computational fluid dynamics analysis of vorticity redution for turbocharged internal combustion engines

Wilczynski, Daniel (Universitat Politècnica de València, 2017-09-26)

El trabajo consiste en la utilización de la mecánica de fluidos computacional (CFD) para el análisis, diseño y optimización de sistemas de atenuación de la vorticidad (swirl) para su instalación en instalaciones de ensayo ...
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 computational study on the aerodynamic behavior of a experimental flat plate propeller

Ponce Soler, José Alberto (Universitat Politècnica de València, 2024-11-18)

[ES] En el presente trabajo se analiza el comportamiento aerodinámico de una hélice experimental de placa plana mediante simulación de dinámica de fluidos computacional (CFD), con el objetivo de comprender su eficiencia y ...