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Títol: Design and implementation of the measuring system for a water tunnel

Estudiants que han llegit aquest projecte:


Departament: FIS

Títol: Design and implementation of the measuring system for a water tunnel

Data inici oferta: 10-02-2023     Data finalització oferta: 10-10-2023

Estudis d'assignació del projecte:
Tipus: Individual
Lloc de realització: EETAC
Paraules clau:
water tunnel, low Reynolds number flow, measurement system
Descripció del contingut i pla d'activitats:
The aim of this project is to design and start the implementation of the measuring system for a small water tunnel that was devised to run with, very little upstream turbulence and a greatly homogeneous flow velocity in the test section, both in the ultra low Reynolds number regime and across the transitional regime.

The measurement system will include, in the long run, a three component balance and flow visualisation. In the meantime, the project aims at implementing the means to measure point velocities in the bulk and in close vicinity of solid walls so as to characterise the flow within the test section and propose actions to correct deficiencies. The possible future installation of a PIV system will also be assessed.

The work plan will be as follows:

1) Literature review on small water tunnels for low Reynolds number testing and measurement systems.
2) Choice of the most adequate measurement devices/probes and budget request.
3) Design and dimensioning of the measurement system to assess the flow in the test section.
4) Test chamber flow characterisation.
5) Design and implementation of the measurement system to test models.
6) Data analysis
7) Conclusions and recommendations.
Overview (resum en anglès):
The main objective of this work is the design of the model support and the analysis of a
measurement system for the low Reynolds number Rolling Hills type water tunnel of the
Castelldefels School of Telecommunication and Aerospace Engineering. The techniques
of Hot Wire Thermal Anemometry (CTA) and Particle Image Velocimetry (PIV) will be analyzed.

For flow analysis, the characteristics and properties of both systems have been compared
and it has been decided to incorporate a PIV system instead of a Hot-Film CTA system.
This decision is supported by ease of use for the user, capabilities to characterize global
flow, and complexity of CTA systems at very low speeds.

For the support, a C-type structure with integrated mobility capabilities through stepper
motors has been chosen, allowing the modification of the experiment conditions. To validate the integration, CFD simulations have been carried out to determine the influence of
the structure on the flow and possible biases in the experimental results.

The project has been developed using Dassault Systems¿ 3DEXPERIENCE design and
simulation software, representing an evolution of previous work. This project is framed as
an evolution of the general project and establishes the basis for future stages of physical
integration and commissioning of the system.

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