Autore: Alice Cabitza
Relatore: Pierpaolo Puddu
Università: Università degli Studi di Cagliari
Facoltà: Facoltà di Ingegneria
Corso: Laurea Spec. in Ingegneria Meccanica
Data di Discussione: 22/07/2013
Voto: 110 cum laude
Disciplina: Fluidodinamica
Tipo di Tesi: Sperimentale
Altri Relatori: Dipl.-Ing. Christoph Biegger, Prof. Dr.-Ing. Bernhard Weigand
Lingua: Inglese
Grande Area: Area Scientifica
Dignità di Stampa: Si
In Collaborazione con: Institute of Aerospace Thermodynamics (ITLR), University of Stuttgart, Germany

Descrizione:
Background:
One of the main tasks of gas turbine design is the efficiency increase for example by increasing the combustion temperature and resulting the turbine entry temperature. Therefore a critical part of the system is the turbine blade especially the leading edge due to high temperatures and thermal gradients. Different cooling techniques were investigated in the last decades to enhance the convective heat transfer. A promising method for the leading edge cooling is a vortex chamber or swirl chamber, although the complex flow is far from being completely understood. A vortex chamber consists of a pipe with tangential inflow ducts. These induce a highly three dimensional (3D) swirling flow, that improves the heat transfer. The task of this thesis is to investigate the fluid dynamics of a vortex chamber via Particle Image Velocimetry (PIV) measurements.

Tasks in detail:
The first step is a literature review of vortex chambers and PIV measurement techniques. After that it follo ...

Grado di Innovazione:
Le misure sperimentali effettuate e descritte in questa tesi sono state svolte con metodi all’avanguardia e di cui esistono ancora pochi esempi in letteratura.