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Browsing by Author "Arnau Martínez, Francisco José"

Now showing items 1-20 of 67

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 holistic methodology to correct heat transfer and bearing friction losses from hot turbocharger maps in order to obtain adiabatic efficiency of the turbomachinery

Serrano, J.R.; Olmeda, P.; Arnau Martínez, Francisco José; Samala, Vishnu (SAGE Publications, 2020-10)

[EN] Turbocharger performance maps provided by manufacturers are usually far from the assumption of reproducing the isentropic performance. The reason being, those maps are usually measured using a hot gas stand. The ...
A Methodology for Measuring Turbocharger Adiabatic Maps in a Gas-Stand and Its Usage for Calibrating Control Oriented and One-Dimensional Models at Early ICE Design Stages

Serrano, J.R.; Arnau Martínez, Francisco José; García-Cuevas González, Luis Miguel; Gómez-Vilanova, Alejandro; Guilain, Stephane; Batard, Samuel (ASME International, 2021-04-01)

[EN] In this work, a methodology is proposed to standardize turbochargers testing based on measuring the maps twice: in close to adiabatic and in diathermal conditions. Along the paper, it is discussed with special detail ...
A non-linear quasi-3D model with Flux-Corrected-Transport for engine gas-exchange modelling

Torregrosa, A. J.; Broatch Jacobi, Jaime Alberto; Arnau Martínez, Francisco José; Hernández-Marco, Manuel (Elsevier, 2016-01-01)

Modelling has proven to be an important tool in the design of manifolds and silencers for internal combustion engines. Although simple 1D models are generally sufficiently precise in the case of manifold models, they would ...
A Robust Adiabatic Model for a Quasi-Steady Prediction of Far-Off Non-Measured Performance in Vaneless Twin-Entry or Dual-Volute Radial Turbines

Serrano, J.R.; Arnau Martínez, Francisco José; García-Cuevas González, Luis Miguel; Samala, Vishnu (MDPI AG, 2020-03)

[EN] The current investigation describes in detail a mass flow oriented model for extrapolation of reduced mass flow and adiabatic efficiency of double entry radial inflow turbines under any unequal and partial flow admission ...
A study on the internal convection in small turbochargers. Proposal of heat transfer convective coefficients

Serrano Cruz, José Ramón; Olmeda González, Pablo Cesar; Arnau Martínez, Francisco José; Reyes Belmonte, Miguel Ángel; Tartoussi, Hadi (Elsevier, 2015-10-05)

Nowadays turbochargers play an important role in improving internal combustion engines (ICE) performance. Usually, engine manufacturers use computer codes to predict the behaviour of both engine and turbocharger, the ...
Adaptation of a compression ignition engine for operating under oxy-fuel combustion conditions using oxygen separation membranes

Farias Da Silva, Vitor Hugo (Universitat Politècnica de València, 2021-11-18)

[ES] Se estudia el concepto de oxicombustión en un motor de encendido por compresión (CIE) que utiliza membranas conductoras iónico-electrónicas mixtas (MIEC) para separar el oxígeno (O2) del aire para lograr una combustión ...
Adapting an internal combustion engine to oxy-fuel combustion with in-situ oxygen production

Arnau Martínez, Francisco José; Novella Rosa, Ricardo; García-Cuevas González, Luis Miguel; Gutierrez-Castro, Fabio Alberto (American Society of Mechanical Engineers (ASME), 2021-10-15)

[EN] In transport applications, reciprocating internal combustion engines still have important advantages in terms of endurance and refueling time and available infrastructure when compared against fuel cell or battery-based ...
An Experimental and Modeling Strategy for Obtaining Complete Characteristic Maps of Dual-Volute Radial Inflow Turbines

Serrano, J.R.; Arnau Martínez, Francisco José; García-Cuevas González, Luis Miguel; Samala, Vishnu; Guilain, Stephane; Batard, Samuel (ASME International, 2021-07-01)

[EN] Despite the importance of turbocharged engines with dual-volute turbines, their characteristic maps and fully predictive modeling using 1D gas dynamic codes are not well established yet. The complexity of unsteady ...
An innovative losses model for efficiency map fitting of vaneless and variable vaned radial turbines extrapolating towards extreme off-design conditions

Serrano, J.R.; Arnau Martínez, Francisco José; García-Cuevas González, Luis Miguel; Inhestern, Lukas Benjamin (Elsevier, 2019-08-01)

[EN] Pulsating flow in automotive turbocharger turbines makes it necessary to know performance characteristics in difficult to measure off-design conditions. Physically based extrapolation models can be used to extrapolate ...
Analysis and Methodology to Characterize Heat Transfer Phenomena in Automotive Turbochargers

Serrano Cruz, José Ramón; Olmeda González, Pablo Cesar; Arnau Martínez, Francisco José; Dombrovsky, A.; Smith, L. (American Society of Mechanical Engineers (ASME), 2015-02)

In the present work a comprehensive study of turbocharger heat transfer phenomena is discussed, showing their relevance compared to gas enthalpy variations through the turbomachinery. The study provides an experimental ...
Analysis of a novel concept of 2-stroke rod-less opposed pistons engine (2S-ROPE): Testing, modelling, and forward potential

Serrano, J.R.; Arnau Martínez, Francisco José; Bares-Moreno, Pau; Gómez-Vilanova, Alejandro; Garrido-Requena, J.; Luna-Blanca, M. J.; Contreras-Anguita, F. J. (Elsevier, 2021-01-15)

[EN] As pollutants and fuel consumption requirements become more constraining, new internal combustion engines generation arise to fulfill future automobile market regulations. In these context spark ignition (SI) engines ...
Analysis of low-pressure exhaust gases recirculation transport and control in transient operation of automotive diesel engines

Luján, José M.; Climent, H.; Arnau Martínez, Francisco José; Miguel-García, Julián (Elsevier, 2018)

[EN] The objective of the study is to determine the behavior of the low pressure exhaust gas recirculation (LP EGR) transport phenomena in the intake manifold during engine transient operation. The investigation also ...
Analysis of the energy balance during World harmonized Light vehicles Test Cycle in warmed and cold conditions using a Virtual Engine

Olmeda, P.; Martín, Jaime; Arnau Martínez, Francisco José; Artham, Sushma (SAGE Publications, 2020-08)

[EN] In recent years, the interests on transient operation and real driving emissions have increased because of the global concern about environmental pollution that has led to new emissions regulation and new standard ...
Análisis de un motor de combustión interna alternativo con un sistema de distribución innovador mediante modelado 1D

Antón Ruiz, José (Universitat Politècnica de València, 2015-05-06)

[ES] El alumno realizará un análisis del potencial de un sistema de distribución innovador que permite mejorar el llenado de un MCIA a altas revoluciones. El estudio se llevará a cabo mediante un modelo unidimensional de ...
Análisis de un motor novedoso de pistones opuestos para su utilización como range extender

Galiana Amorós, José Luis (Universitat Politècnica de València, 2019-10-11)

[ES] La situación actual respecto a las emisiones de los vehículos, los ciclos WLTC y la concienciación de la sociedad está impulsando, entre otros, los vehículos híbridos. Estos vehículos disponen de un motor eléctrico ...
Análisis del caudal de un compresor volumétrico

Arnau Martínez, Francisco José (Universitat Politècnica de València, 2012-11-05)

Los compresores volumétricos alternativos se basan en el movimiento de un embolo gracias a un sistema de biela-manivela. Dicho embolo se mueve por el interior de una cavidad cilíndrica donde se introduce el gas que se desea ...
Aportaciones al Cálculo de las Propiedades Termodinámicas del Gas en el Interior del Cilindro mediante un Submodelo Cero-Dimensional Integrado en Openwan

Hernández Marco, Manuel (2022-02-15)

[ES] El principal objetivo de este trabajo es el de solucionar las diferencias encontradas en los resultados obtenidos al ejecutar un modelo de un mismo motor con dos herramientas distintas, ambas desarrolladas por CMT - ...
Application of the two-step Lax and Wendroff FCT and the CE-SE method to flow transport in wall-flow monoliths

Serrano, J. R.; Arnau Martínez, Francisco José; Piqueras, P.; García Afonso, Óscar (Taylor & Francis, 2014-01-02)

[EN] Gas dynamic codes are computational tools applied to the analysis of air management in internal combustion engines. The governing equations in one-dimensional elements are approached assuming compressible unsteady ...
Assessment of a methodology to mesh the spatial domain in the proximity of the boundary conditions for one-dimensional gas dynamic calculation

J.R. Serrano; Arnau Martínez, Francisco José; Piqueras, P.; Reyes Belmonte, Miguel Ángel (Elsevier, 2011)

[EN] Solution of governing equations for one-dimensional compressible unsteady flow has been performed traditionally using a homogenously distributed spatial mesh. In the resulting node structure, the internal nodes are ...