DGLR-Publications Database - Detailview

Title:

Investigation of the Ducted-Propeller Effects on Aeroacoustic Performance using Phase-Locked PIV

Author(s):
J. Sun, K. Yonezawa, H. Liu
Abstract:
This paper presents an integrated study of the aerodynamic and acoustic performance of a shrouded/ducted propeller, with a specific focus on unveiling the underlying mechanisms associated with the aeroacoustic interplay between the duct and propeller. Using phase-locked particle image velocimetry (PIV), we examined three cases: ducted propellers at relative distances of d = 0.11r, d = 0.29r, and a non-ducted propeller. The integrated analysis combining PIV measurements and numerical simulations unveils noise variation mechanisms. Our findings demonstrate that a shift in the duct-propeller relative position from d = 0.29r to d = 0.11r can reduce overall sound pressure levels by an average of 5.5 dB. The attenuation in noise is attributed to the maintained integrity of tip vortices and increased diffusion of trailing edge vortex sheets at d = 0.11r. The ducts inlet lip preserves tip vortices, thereby decreasing pressure fluctuations and limiting trailing edge noise.
Event:
49th European Rotorcraft Forum 2023, Bückeburg, 2023
Mediatype:
Conference Paper
Language:
englisch
Format:
21,0 x 29,7 cm, 7 Pages
Published in:
DGLR-Bericht, 2023, 2023-01, 49th European Rotorcraft Forum 2023 - Proceedings; S.1-7; 2023; Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V., Bonn
Price:
NA
ISBN:
ISSN:
Comment:
Classifikation:
Keywords:
Available:
Bestellbar
Published:
2023


This Document is part of a superordinate publication:
49th European Rotorcraft Forum 2023 - Proceedings