|Tipo di tesi||Tesi di laurea magistrale|
|Titolo||Modellazione del contatto pistone/canna cilindro e valutazione del campo termico in un motore a combustione interna ad alte prestazioni|
|Titolo in inglese||Modelling of piston/liner contact and evaluation of the thermal field in a high performance internal combustion engine|
|Struttura||Dipartimento di Ingegneria "Enzo Ferrari"|
|Corso di studi||Ingegneria Del Veicolo (D.M.270/04)|
|Data inizio appello||2020-12-03|
|Disponibilità||Accessibile via web (tutti i file della tesi sono accessibili)|
Il presente lavoro di tesi descrive il processo di studio di un modello per l’analisi dinamica del contatto pistone/canna cilindro e per la valutazione del campo termico in un ambiente CFD-3D.
This thesis work describes the studying process of a model for the dynamic analysis of the piston / liner contact and for the evaluation of the thermal field in a CFD-3D environment. Following the increasingly stringent regulations on fuel economy and emissions, the development of ICE is fundamental and increasingly urgent. In particular, the studio's activity carried out in collaboration with one of the leading companies in the automotive sector, Maserati S.p.A., focused on the piston-cylinder system. It represents one of the major sources of losses and emissions. In the first phase the work carried out involved a calibration of the FEM Solid Stress model present in the software used Star CCM +. It allows the calculation of the stress and displacements resulting from the application of specific loads. This calculation model was initially tested on a simplified and purely arbitrary geometry consisting of a single piston ring and the liner. Even the data entered in the first simulations are purely arbitrary. Subsequently, step by step, a physics ever closer to reality was reproduced, based on data obtained from a multibody analysis previously carried out by the company's engineers, using AVL Exite and GT-Power software. A model for the calculation of a variable friction coefficient has also been studied and applied to this geometry, as well as to the subsequent considered. Following a coherent structure of the model and the satisfactory results obtained, the above simplified geometry was implemented, first by introducing a greater number of elements with characteristics similar to those adopted in engineering practice and in the final phase considering a complex geometry of specific components.