Heat exchangers are the main component that drives the thermal management system performance in a framework of turbo fan engine architecture. Additive manufacturing (AM) is a good candidate to optimize the global efficiency of these systems by means of new optimized structures. However, even at a basic level, it is still not known how these structures and their roughness impact on the pressure drop and the heat exchange. In this context, the ROUGH-X project aims to manage the turbulent behaviour and the roughness in additive manufactured heat exchangers in order to optimise their performances. In order to reach the mentioned overall project goal, more specific objectives need to be considered: Generate fundamental knowledge of how the new additive manufactured heat exchangers rough surfaces impact on their thermo-hydraulic behaviour. The project aims to cover first a good understanding of this aspect over single characteristic surfaces and then their impact when combined in the heat exchanger. Identify the best modelling approach for combined turbulence and roughness, when dealing with AM manufactured heat exchangers. This numerical setup would be the way to close the gap between real AM heat exchangers behaviour and their numerical prediction, thus being able to feed advanced design and optimization tools. Analyse the advantages and disadvantages of LES in comparison with RANS simulations, thus also contributing to identify the best modelling set-up. This will be done by benchmark of LES models with roughness surfaces on 3 of the tests cases considered during the project.
Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020
Programa Estatal de I+D+i Orientada a los Retos de la Sociedad