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Browsing by Subject "Heat transfer"

Now showing items 1-20 of 46

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 (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 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 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 ...
Accelerated mild heating of dry-cured ham by applying power ultrasound in a liquid medium

Contreras-Ruiz, Marina; Benedito Fort, José Javier; Bon Corbín, José; Garcia-Perez, J.V. (Elsevier, 2018)

[EN] Mild thermal treatments could be considered a feasible technique with which to improve the texture of dry-cured ham. This study explores the feasibility of using power ultrasound (PuS) to intensify heat transfer during ...
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 ...
Advanced interface models for metal forming simulations

Schmid, Steven R.; Liu, J.; Sellés Cantó, Miguel Ángel; Pasang, Timotius (Elsevier, 2013-11)

Friction and heat transfer in metal forming simulations are usually restricted by software to be interface constants, a situation not reflected by the mechanics of real manufacturing processes. A better simulation approach ...
An analysis of the transient regime temperature field in wet grinding

González-Santander Martínez, Juan Luis; Isidro San Juan, José María; Martín, G. (Springer-Verlag, 2015)

[EN] In this paper, the Samara-Valencia model for heat transfer in grinding is considered. This model is particularized to the case of wet grinding, assuming a constant heat transfer coefficient on the workpiece surface ...
Análisis de la interacción de los procesos de inyección y combustión con el campo de velocidad dentro del cilindro en motores de encendido por compresión.

Pachano Prieto, Leonardo Manuel (2017-07-27)

Emission legislation together with the need of more fuel-efficient engines have driven the development of promising combustion concepts in compression ignition (CI) engines. Most of them, lead toward a lean and low temperature ...
Aportación a la mejora del fiagnóstico de la combustión y balances de energía para motores de combustión interna alternativos

Carreño Arango, Ricardo (2014-09-25)

[EN] In the last 20 years, the research in engines has been centered principally in reducing the emissions and fulfills the normative. However, due to the high exigency of the current normative, the use of after treatment ...
Determination of heat flows inside turbochargers by means of a one dimensional lumped model

Olmeda González, Pablo Cesar; Dolz Ruiz, Vicente; Arnau Martínez, Francisco José; Reyes Belmonte, Miguel Ángel (Elsevier, 2013-04)

In the present paper, a methodology to calculate the heat fluxes inside a turbocharger from diesel passenger car is presented. The heat transfer phenomenon is solved by using a one dimensional lumped model that takes into ...
Development and validation of a finite element model for water - CO2 coaxial gas-coolers

Sanchez, D.; Cabello, R.; Llopis, R.; Torrella Alcaraz, Enrique (Elsevier, 2012-05)

The gas-cooler heat exchanger is a characteristic device of the refrigeration plants that use CO2 as the working fluid in transcritical conditions. The proper gas-cooler sizing, allows getting the maximum effectiveness in ...
Dynamic Identification of Thermodynamic Parameters for Turbocharger Compressor Models

Burke, R.D.; Olmeda González, Pablo Cesar; Serrano Cruz, José Ramón (American Society of Mechanical Engineers (ASME), 2015-10)

A novel experimental procedure is presented which allows simultaneous identification of heat and work transfer parameters for turbocharger compressor models. The method introduces a thermally transient condition and uses ...
Effect of in-cylinder swirl on engine efficiency and heat rejection in a light-duty diesel engine

Olmeda, P.; Martín, J.; Blanco-Cavero, Diego; Warey, A.; Domenech, V. (SAGE Publications, 2017)

[EN] During the last years, the growing awareness about the impacts of climate change lead to an increase in the importance of the efficiency over other criteria in the design of internal combustion engines. In this ...
Effects of piston bowl geometry on Reactivity Controlled Compression Ignition heat transfer and combustion losses at different engine loads

Benajes Calvo, Jesus Vicente; García Martínez, Antonio; Pastor Enguídanos, José Manuel; Monsalve Serrano, Javier (Elsevier, 2016-03-01)

This work investigates the effects of the piston bowl geometry on RCCI (Reactivity Controlled Compression Ignition) heat transfer and combustion losses and its repercussion on the engine efficiency. For this purpose, three ...
Estudio de las capacidades de transmisión de calor en un turbo de sobrealimentación

Varela Martínez, Pau (2018-11-08)

[ES] El presente trabajo consiste en el ensayo completo de un turbocompresor, y la utilización de los datos experimentales obtenidos en la validación de modelos existentes. El proyecto cuenta con dos ensayos bien ...
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 ...
Evaluation of swirl effect on the Global Energy Balance of a HSDI Diesel engine

Benajes, Jesús; Olmeda, P.; Martín, J.; Blanco-Cavero, Diego; Warey, Alok (Elsevier, 2017)

[EN] In the last years, a growing interest about increasing engine efficiency has led to the development of new engine technologies. Since air motion in the chamber is a key issue in internal combustion engines to improve ...
Experimental analysis and one-dimensional modeling of heat transfer phenomena in turbochargers for internal combustion engines

Dombrovsky, Artem (2015-06-16)

[EN] Nowadays, the regulation of pollutant emissions of reciprocating internal combustion engines becomes more and more restrictive. One of the main strategies to reduce those emissions is the reduction of engine volume ...
Experimental analysis of the global energy balance in a DI diesel engine

Payri González, Francisco; Olmeda González, Pablo Cesar; Martín Díaz, Jaime; Carreño, Ricardo (Elsevier, 2015-10-05)

The increasingly stringent internal combustion engines (ICE) emissions regulations, has led to the extended use of after-treatment systems, giving progressively more importance to the engine efficiency optimization. In ...