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Listar por palabra clave "LES"

Mostrando ítems 1-20 de 34

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A coupled lattice Boltzmann/finite volume method for turbulent gas-liquid bubbly flows

Lauwers, Daniel; Meinke, Matthias; Schröder, Wolfgang (Editorial Universitat Politècnica de València, 2022-05-11)

[EN] A simulation method for large eddy simulations (LES) of dispersed gas-liquid bubbly flows based on an Eulerian-Eulerian (E-E) model is presented. A volume averaging approach is used resulting in a set of conservation ...
A study of the controlling parameters of fuel air mixture formation for ECN Spray A

Vogiatzaki, Konstantina; Crua, Cyril; Morgan, Robert; Heikal, Morgan (Editorial Universitat Politècnica de València, 2017-07-28)

[EN] Designing future ultra-high efficiency, ultra-low emission engines requires an in depth understanding of the multiscale, multi-phase phenomena taking place in the combustion chamber. The performance of the fuel ...
Acoplamiento de las características del flujo interno turbulento de una tobera a cálculos de la atomización primaria en chorro diesel mediante DNS

Crialesi Esposito, Marco (Universitat Politècnica de València, 2017-08-29)

The understanding of the combustion process in energy generation, both for stationary purpose or for propulsion, is becoming more and more demanding as the technology progress toward a cleaner combustion able to reduce the ...
Acoustic and pressure characteristics of a ported shroud turbocompressor operating at near surge conditions

Sharma, Sidharath; Broatch, A.; GARCIA TISCAR, JORGE; Nickson, Ambrose K.; Allport, John M. (Elsevier, 2019-05)

[EN] The operation of compressor at lower mass flow rates is limited by surge which is marked by large fluctuations in operational variables and accompanied by significant increase in noise. Ported shroud casing treatment ...
Analysis of the spectral properties of variable-density turbulent reacting shear layers

Ortiz Tarín, José Luis (Universitat Politècnica de València, 2015-05-15)

Spectral analysis of turbulent uxes and new stresses that appear in the variable-density ltered Navier- Stokes equations has been carried out following an analogous procedure to the one used in traditional turbulence ...
Analysis of vortex core generation in pipe flows under different reynolds number conditions

Salvador, Francisco Javier; Carreres, Marcos; Quintero-Igeño, Pedro-Manuel; González-Montero, Lucas Antonio (Springer-Verlag, 2021-06)

[EN] Pipe flow is a well-documented case widely studied in both theoretical and practical applications. The present work aims at studying the influence of the Reynolds number on turbulent vortex distribution using Large ...
Análisis numérico 3D de una rotura de presa utilizando el método VOF y el modelo de turbulencia LES

Sánchez-Cordero, E.; Boix, J.; Gómez, M.; Bladé, E. (Universitat Politècnica de València, 2018-07-30)

[EN] In this paper, three-dimensional numerical analysis of dam-break flow pattern in a laboratory-scale is reported. The simulation was performed using the open source computational fluid dynamics (CFD) solver based on ...
Engineering Large Eddy Simulation of Diesel Sprays

Mompó Laborda, Juan Manuel (Universitat Politècnica de València, 2014-05-09)

The main objective of this PhD thesis is the study of Diesel sprays under evaporative conditions by means of Large Eddy Simulations (LES) techniques. This study has been performed implementing a precise, low-demanding ...
Estudio CFD 3D de la dispersión de un sistema de EGR de alta presión

Miquel Silla, Álvaro (Universitat Politècnica de València, 2017-09-27)

[EN] It consists of a HP EGR system where the mixing between air and EGR is done produce in such a way that the EGR distribution between cylinders isn¿t evenly distributed. Thus, CFD simulations are proposed to study this ...
Estudio CFD de la inyección y mezcla de hidrógeno en quemadores de flujo continuo

Serrano García, Antonio Javier (Universitat Politècnica de València, 2023-10-24)

[ES] Durante las últimas décadas, y especialmente en occidente, la concienciación acerca de la conservación del medio ambiente y la preocupación social por el cambio climático del planeta han ido incrementando. Muchos ...
Estudio computacional acerca de la influencia del uso de combustibles sostenibles de aviación (SAF) en un atomizador pressure-swirl mediante simulaciones VOF-LES con procesado de la curvatura de la interfaz líquido-gas

Lloret Sáez, Álvaro (Universitat Politècnica de València, 2024-11-13)

[ES] Desde la implementación de los motores aero-derivados en la industria aeronáutica se han implementado distintos combustibles en su uso. En la actualidad los combustibles fósiles son los más utilizados en la industria ...
Estudio computacional del flujo interno y atomización primaria en un inyector aeronáutico "pressure-swirl" mediante técnicas avanzadas de mallado

Sánchez Riera, Sebastián (Universitat Politècnica de València, 2021-09-03)

[ES] Desde sus inicios, el crecimiento de la industria aeroespacial ha estado ligado a la investigación, desarrollo e implementación de tecnologías punteras en sus sistemas y vehículos. En la actualidad, la masificación ...
Estudio de la interacción fluido-estructura en una placa plana en condiciones de acoplamiento unidireccional

Sánchez Moreno, Francisco (Universitat Politècnica de València, 2019-06-28)

[EN] In the present study an analysis about Fluid-Structure Interaction (FSI) is carried out.The geometry is a rectangular flat plate which is attached by one of its sides to a squarecross section bar. This bar is in charge ...
Estudio fundamental de la turbulencia en conductos bajo diferentes números de Reynolds

González Montero, Lucas Antonio (Universitat Politècnica de València, 2019-10-29)

[ES] El flujo en conductos es un caso muy bien documentado, estudiado tanto desde el punto de vista teórico como el experimental. Este trabajo tiene el objetivo de estudiar, mediante cálculos computacionales con Large Eddy ...
Estudio LES del comportamiento de un chorro no reactivo con un co-flujo: Efecto del modelo SGS, tamaño de celda y condiciones de contorno

Giraldo Valderrama, Jhoan Sebastián (Universitat Politècnica de València, 2015-05-18)

[EN] The experiment of Cabra has been of great interest, because these kind of flames allow analysis of flame stabilization by a vitiated co-flow (like products of combustion). This phenomenon has been seen in several ...
Evaluation of modelling parameters for computing flow-induced noise in a small high-speed centrifugal compressor

Sharma, Sidharath; GARCIA TISCAR, JORGE; Allport, John M.; Barrans, Simon; Nickson, Ambrose K. (Elsevier, 2020-03)

[EN] Developments in computing infrastructure and methods over the last decade have enhanced the potential of numerical methods to reasonably predict the aerodynamic noise. The generation and propagation of the flow induced ...
Evidence of vortex driven primary breakup in high pressure fuel injection

Shi, Junmei; Aguado Lopez, Pablo; Gomez Santos, Eduardo; Guerrassi, Noureddine; Dober, Gavin; Bauer, Wolfgang; Lai, Ming-Chia; Wang, Jin (Editorial Universitat Politècnica de València, 2017-07-28)

[EN] This paper is to present a detailed case study on how the nozzle flow dynamics influences the primary breakup in the spray formation process of diesel injection. The investigation was based on a 3-hole real-application ...
Experimental and Computational Investigation of Subcritical Near-Nozzle Spray Structure and Primary Atomization in the Engine Combustion Network Spray D

Battistoni, Michele; Magnotti, Gina M.; Genzale, Caroline L.; Arienti, Marco; Matusik, Katarzyna E.; Duke, Daniel J.; GIRALDO-VALDERRAMA, JHOAN SEBASTIAN; Ilavsky, Jan; Kastengren, Alan L.; Powell, Christopher F.; Marti-Aldaravi, Pedro (SAE International, 2018)

[EN] In order to improve understanding of the primary atomization process for diesel-like sprays, a collaborative experimental and computational study was focused on the near-nozzle spray structure for the Engine Combustion ...
Experimental and Numerical Investigation of Dispersed and Continuous Liquid Film under Boiling conditions

Habchi, Chaouki; Lamarque, Nicolas; Helie, Jerome; Jay, Stéphane (Editorial Universitat Politècnica de València, 2017-07-28)

[EN] In this work, both experimental and numerical investigations have been carried out in order to improve the modelling of the vaporization of wall liquid-deposits in internal combustion engines. A comprehensive model ...
High-order spectral simulations of theflow in a simplified urban environment

Torres Greus, Pablo (Universitat Politècnica de València, 2020-09-17)

[ES] El estudio de los flujos urbanos ha sido un campo de interés en la mecánica de fluidos moderna por ahora. Más de veinte años. El conocimiento de cómo se comporta un flujo de aire en las copas urbanas presenta muchas ...