Projecte llegit
Títol: Water tunnel design, construction and comissioning
Director/a: MELLIBOVSKY ELSTEIN, FERNANDO PABLO
Departament: FIS
Títol: Water tunnel design, construction and comissioning
Data inici oferta: 31-01-2019 Data finalització oferta: 30-09-2019
Estudis d'assignació del projecte:
DG ENG AERO/SIS TEL- DG ENG AERO/TELEMÀT
- GR ENG SIST AEROESP
| Tipus: Individual | |
| Lloc de realització: EETAC | |
| Paraules clau: | |
| Water tunnel, Experimental Aerodynamics, Experimental Hydrodynamics | |
| Descripció del contingut i pla d'activitats: | |
| The aim of this project is to design, build and comission a small water tunnel for aero and hydrodynamic testing of reduced scale models of both submerged and surface bodies. The water tunnel should be able 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. Three component force mesurements and flow visualisation will be available, and the future installation of a PIV system considered at the design stage.
The work plan will be as follows: 1) Literature review on small water tunnels for low Reynolds number testing 2) Choice of the most adequate water tunnel for our purposes 3) Design and dimensionning of the water tunnel 4) Simulation of the water flow with CFD simulation tools 5) Design of an appropriate screen or honeycomb for flow homogeneisation 6) Design of the return piping system and dimensioning of the required pump 7) Construction and comissioning 8) Preliminary testing |
|
| Overview (resum en anglès): | |
| This document covers the study, design and construction of a low cost Water Tunnel to perform practical studies and lab work at EETAC (UPC Castelldefels). This project has been divided in three principal phases: Study, Design and Construction.
In the first phase of the project, a theoretical study regarding the fluid dynamics of water tunnels has been done. This study is essential in order to get an optimal design of the Water Tunnel and also fulfil the initial design requirements. The main design requirements are to achieve a homogeneous velocity at the test region and the capacity to work with Reynolds numbers comprised between 500 and 1000. Once these requirements were established, the design phase started. SolidWorks was used to create the design. Once the design was created, it needs to be validated. For this purpose, three different simulations were performed in order to validate the design with a Computational Fluid Dynamics (CFD) software. The chosen software was ANSYS. The objective of the first simulation was to validate the property of symmetry inside the Water Tunnel. The symmetry inside the Water Tunnel was proved and a second simulation with half the control volume and a finer mesh was realized. Finally, in order to prove the mesh convergence, one last simulation was done. All these simulations proved that the Water Tunnel design fulfilled all the initial design requirements. The construction procedure begun once the design was validated. This last phase is still ongoing; the tunnel is being built by Metalvent S.A company. This Water Tunnel has been designed with the objective of reducing costs when compared it with other water tunnels build globally. Also, the size of the Water Tunnel is also minimized so it can be a part of the laboratory equipment in EETAC. This Water Tunnel will be an interesting contribution to the University equipment, and thanks to it, other projects will be done, from implementing new systems that improve the Water tunnel to experiments that uses the Water Tunnel as the main tool. |
|