The Design of a Small Aeroacoustic Wind Tunnel
P.R. Vendrig (TU Delft - Aerospace Engineering)
Robert Mikkelsen – Mentor (Technical University of Denmark (DTU))
Daniele Ragni – Graduation committee member (TU Delft - Wind Energy)
Andreas Fischer – Coach (Technical University of Denmark (DTU))
More Info
expand_more
Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.
Abstract
In this master thesis project the initial steps for the design of a new wind tunnel
for aeroacoustic measurements are made. Well-documented sizing methods for
different wind tunnel parts were found in a literature study and were used
together with 2D CFD simulations to create a new wind tunnel design. Thick
corner vanes were used in this design with the purpose of using them as baffle
mufflers to create a better environment for aeroacoustic measurements inside the test section. The performance of the wind tunnel was evaluated thereafter by 3D CFD simulations. The 3D simulations provide an idea of the flow velocities, the flow uniformity, turbulence intensities, pressure losses and noise sources inside the wind tunnel. Since an existing wind tunnel fan and 42 kW motor was to be reused, noise measurements were done to find the noise characteristics of the fan-motor combination and to have an idea of how noise would propogate in
the environment were the new wind tunnel would be placed. After the noise
measurements, predictions of the transmission loss through the corner vanes
were made by using finite element analyses.