Research output per year
Research output per year
Bente J. Meijerink, Fernanda L. Dos Santos, Laura Botero-Bolívar, Cornelis H. Venner, Leandro D. de Santana
Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review
Leading-edge noise is the dominant noise source in many engineering applications, such as fans and propellers, because these devices are exposed to a turbulent inflow. Amiet’s theory is widely used to predict the leading-edge noise for these applications. This theory was developed for a flat plate at zero angle of attack. However, in real applications, the fluid dynamic device is no longer a flat plate, and it often operates with an angle of attack. Furthermore, the basis for the Amiet’s leading-edge noise model is the wall-pressure fluctuations caused by the interaction of the inflow turbulence with the airfoil leading edge. Therefore, in this paper, we experimentally investigate the angle of attack effects on the wall-pressure fluctuations at the leading-edge region when the airfoil is submitted to a turbulent inflow. We also compare the measurements with Amiet’s theory for the wall-pressure fluctuations. In this research, a NACA 0008 airfoil was investigated because this geometry approximates the cross-section of a marine propeller. The research was performed in the UTwente Aeroacoustic Wind Tunnel. The wall-pressure fluctuations were measured by using the remote microphone probe technique. Amiet’s wall-pressure fluctuation prediction matches well with the experimental data for chordwise positions x/c ≤ 2.12% and for low angles of attack of 0◦ and 2◦ . For chordwise positions x/c≥ 5% and for angles of attack higher than 2◦, the spectral shape of Amiet’s prediction does not match well with the experimental wall-pressure fluctuation spectrum. This is because the wall-pressure fluctuations are affected by the transition from laminar to turbulent boundary layer as the angle of attack increases and for further downstream chordwise positions.
Original language | English |
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Title of host publication | 28th AIAA/CEAS Aeroacoustics Conference, 2022 |
Publisher | American Institute of Aeronautics and Astronautics |
ISBN (Print) | 9781624106644 |
DOIs | |
Publication status | Published - 13 Jun 2022 |
Event | 28th AIAA/CEAS Aeroacoustics Conference 2022 - Southampton, United Kingdom Duration: 14 Jun 2022 → 17 Jun 2022 Conference number: 28 |
Conference | 28th AIAA/CEAS Aeroacoustics Conference 2022 |
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Country/Territory | United Kingdom |
City | Southampton |
Period | 14/06/22 → 17/06/22 |
Research output: Thesis › PhD Thesis - Research UT, graduation UT