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Browsing by Subject "Turbocharger"

Now showing items 1-20 of 33

A methodology to study oil-coking problem in small turbochargers

Serrano, J.R.; Tiseira, Andrés-Omar; García-Cuevas González, Luis Miguel; Rodriguez-Usaquen, Yuly Tatiana; Guillaume, Mijotte (SAGE Publications, 2020-09-01)

[EN] In compliance with oncoming emission directives, turbocharging and increasing complexity in the turbocharger system demands a great effort from researchers on the development of effective procedures and tools to cope ...
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 ...
Acoustic characterization of automotive turbocompressors

Torregrosa, A. J.; Broatch Jacobi, Jaime Alberto; Navarro García, Roberto; García Tíscar, Jorge (SAGE Publications (UK and US), 2015-01)

The performance of different experimental techniques proposed in the literature for acoustic characterization was assessed through the study of the noise generated by the compressor of an automotive turbocharger under ...
Adaptation of a 1-D tool to study transient thermal in turbocharger bearing housing

Serrano, J.R.; Tiseira, Andrés-Omar; García-Cuevas González, Luis Miguel; Rodriguez-Usaquen, Yuly Tatiana (Elsevier, 2018)

[EN] The heat transfer model can be used in a one-dimensional (1-D) engine simulation. When the engine speed is reduced to zero, the codes have been upgraded to calculate transient turbocharger thermal conditions. The ...
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 ...
Caracterización teórico-experimental de turbocompresores de automoción

García-Cuevas González, Luis Miguel (Universitat Politècnica de València, 2014-01-27)

[ES] Desde su introducción, la turbosobrealimentación ha permitido reducir el consumo y aumentar la potencia específica de los motores de combustión interna alternativos de forma notable. En los últimos años, debido a las ...
Centrifugal compressor influence on condensation due to Long Route-Exhaust Gas Recirculation mixing

Galindo, José; Navarro, Roberto; Tarí, Daniel; García -Olivas, Guillermo (Elsevier, 2018-11-05)

[EN] State of the art techniques for reducing pollutant emission in internal combustion engines often require local flow assessment, specially in the air management field. This work addresses the interaction between a ...
Characterization of a radial turbocharger turbine in pulsating flow by means of CFD and its application to engine modeling

Galindo, José; Fajardo, Pablo; Navarro García, Roberto; García-Cuevas González, Luis Miguel (Elsevier, 2013-03)

This paper presents a numerical study analyzing the effect of pulsating flow in a variable geometry radial inflow turbine. The turbine behavior is analyzed under isentropic pulses, which are similar to those created by a ...
Contribution to Tip Leakage Loss Modeling in Radial Turbines Based on 3D Flow Analysis and 1D Characterization

Serrano, J.R.; Navarro, Roberto; García-Cuevas González, Luis Miguel; Inhestern, Lukas Benjamin (Elsevier, 2019-08)

[EN] The characterization of tip leakage flow plays an important role for one-dimesional loss modeling and design in radial turbine research. Tip leakage losses can be expressed as function of fluid momentum and mass flow ...
Development and validation of a radial turbine efficiency and mass flow model at design and off-design conditions

Serrano Cruz, José Ramón; Arnau Martínez, Francisco José; García-Cuevas González, Luis Miguel; Dombrovsky, Artem; Tartoussi, H. (Elsevier, 2016-11-15)

Turbine performance at extreme off-design conditions is growing in importance for properly computing turbocharged reciprocating internal combustion engines behaviour during urban driving conditions at current and future ...
Development and validation of a radial variable geometry turbine model for transient pulsating flow applications

Galindo, José; Tiseira Izaguirre, Andrés Omar; Fajardo, P.; García-Cuevas González, Luis Miguel (Elsevier, 2014-09)

This paper presents the development and validation of a one-dimensional radial turbine model able to be used in automotive turbocharger simulations. The model has been validated using results from a numerical 3D CFD ...
Development and verification of an in-flow water condensation model for 3D-CFD simulations of humid air streams mixing

Serrano, J.R.; Piqueras, P.; Navarro, Roberto; Tarí, Daniel; Meano, Cesare Maria (Elsevier, 2018-05-15)

[EN] Bulk flow condensation caused by the mixing of air streams at different temperatures and humidities is a thermodynamic process that requires strong assumptions to be calculated with low computational effort. The ...
Diagnóstico de fallos en turbogrupos de sobrealimentación de motores, con un banco de turbos de flujo continuo, y mediante vibraciones en condiciones de servicio

Algarra Carrasco, Víctor (Universitat Politècnica de València, 2013-03-09)

[ES] El presente TFM trata sobre el diagnóstico de fallos en turbogrupos, midiendo las prestaciones y vibraciones del mismo en una sala de ensayos o analizando únicamente su espectro vibratorio si está en condiciones de ...
Effect of the numerical scheme resolution on quasi-2D simulation of an automotive radial turbine under highly pulsating flow

Galindo, José; Climent, H.; Tiseira Izaguirre, Andrés Omar; García-Cuevas González, Luis Miguel (Elsevier, 2016-01-01)

Automotive turbocharger turbines usually work under pulsating flow because of the sequential nature of engine breathing. However, existing turbine models are typically based on quasi-steady assumptions. In this paper a ...
Evaluation of different heat transfer conditions on an automotive turbocharger

Aghaali, Habib; Angström, Hans-Erik; Serrano Cruz, José Ramón (SAGE Publications (UK and US), 2015-02)

This paper presents a combination of theoretical and experimental investigations for determining the main heat fluxes within a turbocharger. These investigations consider several engine speeds and loads as well as different ...
Experimental approach for the characterization and performance analysis of twin entry radial-inflow turbines in a gas stand and with different flow admission conditions

Serrano, J.R.; Arnau Martínez, Francisco José; García-Cuevas González, Luis Miguel; Samala, Vishnu; Smith, Les (Elsevier, 2019-08)

[EN] In an internal combustion engine, twin entry turbine operates under different unequal admission conditions by feeding the turbine with a dissimilar amount of flow in each entry for a majority of the time. Despite of ...
Experimental characterization and mean line modelling of twin-entry and dual-volute turbines working under different admission conditions with steady flow

Samala, Vishnu (Universitat Politècnica de València, 2020-10-29)

[ES] A pesar de la importancia de las turbinas radiales de doble entrada y doble voluta en el flujo para motores turboalimentados, sus mapas característicos y su modelado totalmente predictivo utilizando códigos dinámicos ...
Experimental methodology for turbocompressor in-duct noise evaluation based on beamforming wave decomposition

Torregrosa, A. J.; Broatch Jacobi, Jaime Alberto; Margot , Xandra; García Tíscar, Jorge (Elsevier, 2016-08-18)

An experimental methodology is proposed to assess the noise emission of centrifugal turbocompressors like those of automotive turbochargers. A step-by-step procedure is detailed, starting from the theoretical considerations ...
Experimental validation of a quasi-two-dimensional radial turbine model

Galindo, José; Arnau Martínez, Francisco José; García-Cuevas González, Luis Miguel; Soler-Blanco, Pablo (SAGE Publications, 2018-07-20)

[EN] This article presents the experimental validation of a quasi-two-dimensional radial turbine model able to be used in turbocharged reciprocating internal combustion engine simulations. A passenger car variable-geometry ...
External heat losses in small turbochargers: Model and experiments

Payri González, Francisco; Olmeda, P.; Arnau Martínez, Francisco José; Dombrovsky, Artem; Smith, Les (Elsevier, 2014-07-15)

[EN] The behavior of small turbochargers is deeply affected by heat transfer phenomena. The external heat losses of these machines are studied and a simplified model that takes into account both radiation and convective ...