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Listar por Entidad UPV "Universitat Politècnica de València. Departamento de Máquinas y Motores Térmicos - Departament de Màquines i Motors Tèrmics"

Mostrando ítems 41-60 de 2133

A new methodology for uncertainties characterization in combustion diagnosis and thermodynamic modelling

Benajes Calvo, Jesus Vicente; Olmeda González, Pablo Cesar; Martín Díaz, Jaime; Carreño Arango, Ricardo (Elsevier, 2014-10-05)

Combustion diagnosis based on in-cylinder pressure signals as well as 0D thermodynamic modelling, are widely used to study and optimize the combustion in reciprocating engines. Both approaches share some uncertainties ...
A New Methodology to Evaluate Engine Ignition Systems in High Density Conditions

Payri Marín, Raúl; Novella Rosa, Ricardo; García Martínez, Antonio; Domenech Llopis, Vicente (Society for Experimental Mechanics (SEM), 2014-06)

In this research, a new methodology to evaluate the operation of spark ignition systems in high density conditions is presented. New requirements in engines and new combustion modes demand more from these systems. One of ...
A New Model for Matching Advanced Boosting Systems to Automotive Diesel Engines

Galindo, José; Luján, José M.; Climent, H.; Guardiola, Carlos; Varnier, Olivier (SAE International, 2014)

[EN] Boosting technologies have been key enablers for automotive engines development through downsizing and downspeeding. In this situation, numerous multistage boosting systems have appeared in the last decade. The ...
A New Tool to Perform Global Energy Balances in DI Diesel Engines 2014-01-0665

Payri González, Francisco; Olmeda González, Pablo Cesar; Martín Díaz, Jaime; Carreño, Ricardo (SAE International, 2014)

[EN] The generalization of exhaust aftertreatment systems along with the growing awareness about climate change is leading to an increasing importance of the efficiency over other criteria during the design of reciprocating ...
A non-linear quasi-3D model for air management modelling in engines

Hernández Marco, Manuel (Universitat Politècnica de València, 2018-06-08)

El modelado se ha convertido en los últimos años en una herramienta esencial en el diseño de motores de combustión interna alternativos, ya que permite reducir considerablemente el tiempo y los costes de desarrollo. Las ...
A Note on Bubble Sizes in Subcooled Flow Boiling at Low Velocities in Internal Combustion Engine-Like Conditions

Torregrosa, A. J.; Broatch, A.; Olmeda, P.; Cornejo-Luna, Omar (Isfahan University of Technology, 2016-09)

[EN] Current trends in engine design indicate the necessity to take advantage of the highest rates of heat transfer associated with nucleate boiling, mostly at high engine loads. When used in conjunction with advanced ...
A novel inlet boundary condition for VOF-DNS simulations of the primary breakup of prefilming airblast atomizers

Payri, Raul; Salvador, Francisco Javier; Carreres, Marcos; Moreno-Montagud, Carlos (2021-09-02)

[EN] Prefilming airblast atomizers are becoming widely used in state-of-the-art aero engines. The planar configuration experimentally studied by the Karlsruhe Institute of Technology (KIT) has been computationally ...
A numerical approach for predicting flow-induced acoustics at near-stall conditions in an automotive turbocharger compressor

Navarro García, Roberto (Universitat Politècnica de València, 2014-11-13)

Se realiza un modelo CFD-3D de un compresor centrífugo. Se determina la configuración numérica adecuada para simular puntos de funcionamiento cercanos a bombeo. Se validan los resultados frente a ensayos experimentales ...
A numerical framework for airfoil gust response and active pitch control

Grau Lozano, Ernest (Universitat Politècnica de València, 2022-10-04)

[ES] El objetivo de este trabajo es crear un marco numérico para estudiar, por medio de simulaciones URANS, la dinámica de un vehículo aéreo no tripulado sometido a ráfagas de viento y aplicar leyes de control para estabilizar ...
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 one-dimensional modeling study on the effect of advanced insulation coatings on internal combustión engine efficiency

Broatch, A.; Olmeda, P.; Margot, Xandra Marcelle; Gómez-Soriano, Josep (SAGE Publications, 2021-07-01)

[EN] This article presents a study of the impact on engine efficiency of the heat loss reduction due to in-cylinder coating insulation. A numerical methodology based on one-dimensional heat transfer model is developed. ...
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 Rapid Electrochemical Impedance Spectroscopy and Sensor-Based Method for Monitoring Freeze-Damage in Tangerines

Albelda Aparisi, Pablo; Fortes Sánchez, Elena; Contat-Rodrigo, L; Masot Peris, Rafael; Laguarda-Miro, Nicolas (Institute of Electrical and Electronics Engineers, 2021-05-15)

[EN] This study focuses on the analysis and early detection of freeze-damage in tangerines using a specific double-needle sensor and Electrochemical Impedance Spectroscopy (EIS). Freeze damage may appear in citrus fruits ...
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 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 sparse mesh for Compact Finite Difference Fourier solvers with radius-dependent spectral resolution in circular domains

Torregrosa, A. J.; Hoyas, S; Gil, A.; García Galache, José Pedro (Elsevier, 2014-04)

This paper presents a new method for the resolution of elliptic and parabolic equations in circular domains. It can be trivially extended to cylindrical domains. The algorithm uses a mixed Fourier-Compact Finite Difference ...
A spectroscopy study of gasoline partially premixed compression ignition spark assisted combustion

Pastor Soriano, José Vicente; García Oliver, José María; García Martínez, Antonio; Micó Reche, Carlos; Durret, R. (Elsevier, 2013-04)

Nowadays many research efforts are focused on the study and development of new combustion modes, mainly based on the use of locally lean air–fuel mixtures. This characteristic, combined with exhaust gas recirculation, ...
A statistical design of experiments for optimizing the MALDI-TOF-MS sample preparation of polymers. An application in the assessment of the thermo-mechanical degradation mechanisms of poly (ethylene terephthalate)

Badía Valiente, José David; Strömberg, Emma Marie; Ribes Greus, María Desamparados; Karlsson, Sigbritt (ELSEVIER SCIENCE BV, 2011)

[EN] The sample preparation procedure for MALDI-TOF MS of polymers is addressed in this study by the application of a statistical Design of Experiments (DoE). Industrial poly (ethylene terephthalate) (PET) was chosen as ...
A stochastic method for the energy management in hybrid electric vehicles

Payri González, Francisco; Guardiola, Carlos; Plá Moreno, Benjamín; Blanco-Rodriguez, David (Elsevier, 2014-08)

There are many approaches addressing the problem of optimal energy management in hybrid electric vehicles; however, most of them optimise the control strategy for particular driving cycles. This paper takes into account ...
A Study of the Transient Response of Duct Junctions: Measurements and Gas-Dynamic Modeling with a Staggered Mesh Finite Volume Approach

Torregrosa, A. J.; Broatch, A.; García-Cuevas González, Luis Miguel; Hernández-Marco, Manuel (MDPI AG, 2017-05-08)

[EN] Duct junctions play a major role in the operation and design of most piping systems. The objective of this paper is to establish the potential of a staggered mesh finite volume model as a way to improve the description ...