Design and realization of an instantaneous concentration measurement system for wind tunnel applications

Zucchini, Davide (2021) Design and realization of an instantaneous concentration measurement system for wind tunnel applications. [Laurea magistrale], Università di Bologna, Corso di Studio in Aerospace engineering / ingegneria aerospaziale [LM-DM270] - Forli', Documento ad accesso riservato.
Documenti full-text disponibili:
[img] Documento PDF (Thesis)
Full-text accessibile solo agli utenti istituzionali dell'Ateneo
Disponibile con Licenza: Salvo eventuali più ampie autorizzazioni dell'autore, la tesi può essere liberamente consultata e può essere effettuato il salvataggio e la stampa di una copia per fini strettamente personali di studio, di ricerca e di insegnamento, con espresso divieto di qualunque utilizzo direttamente o indirettamente commerciale. Ogni altro diritto sul materiale è riservato

Download (5MB) | Contatta l'autore

Abstract

The aim of this project work is the design and realization of an instantaneous concentration measurement system to be used with binary gas mixtures. The design is focused on the simplicity of the set up and on its compactness, and it is specifically intended to be used in wind tunnel applications. The outcome of the design process for the specified system is an aspirating hot-wire probe based on a polypropylene 3D printed body and a simple single wire sensor. Specifically, a 3D printing machine based on the Material Jetting (MJ) technology was used for the probe manufacturing. One of the most important design features is the possibility to get access to the wire through the removal of a single probe component, which is a nearly effortless operation. This feature allows to repair the broken wire sensor without the need of substitute the whole probe. From these design specifications it could be understood that due also to its dimensions, the probe must be handled with care, and it cannot operate inside hot flows or uncontrolled flow temperature and pressure conditions. It was not possible to test the probe behaviour in presence of flows with composition variations due to the lack of the necessary instrumentation to perform this kind of experiments. Nonetheless, the design effectiveness could be confirmed by verifying that the hot-wire signal remained constant when the probe was exposed to a variable speed constant composition flow. This proved the probe insensitivity to external flow speed, and it opened the possibility to further testing sessions involving gases.

Abstract
Tipologia del documento
Tesi di laurea (Laurea magistrale)
Autore della tesi
Zucchini, Davide
Relatore della tesi
Scuola
Corso di studio
Ordinamento Cds
DM270
Parole chiave
Hot-wire, gas concentration measurements, wind tunnels, instantaneous measurements, fast-response sensors, aspirating gas probes, Additive Manufacturing technologies, AM, Material Jetting 3D printing, MJ
Data di discussione della Tesi
15 Luglio 2021
URI

Altri metadati

Statistica sui download

Gestione del documento: Visualizza il documento

^