Experimental Identification of Noise Mechanisms Present in a Partially Buried BLI Ducted Fan

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

Abstract

A comprehensive experimental investigation was conducted to analyze the noise generated by a boundary layer ingestion (BLI) ducted fan. The study focuses on the Bell X-22A-like ducted fan, which is partially immersed in a turbulent boundary layer developed over a curved S-plate. A thorough assessment was carried out under a wide range of fan thrust loading regimes. The flow field and noise measurements revealed that the noise originates from the complex interactions between ducted fan and the incoming boundary layer. Specifically, in high thrust conditions, the near-upstream region of a BLI ducted fan exhibits a predominant suction effect in the boundary layer. Consequently, the noise signature exhibits a structured pattern organized into haystacks, influenced by the strong interaction between fan noise and the boundary layer. Conversely, at low thrust conditions, the turbulent boundary layer ingests into the ducted fan without undergoing any suction effect. As a result, the noise signature features an altered haystack effects.
Original languageEnglish
Title of host publication30th AIAA/CEAS Aeroacoustics Conference (2024)
PublisherAmerican Institute of Aeronautics and Astronautics Inc. (AIAA)
ISBN (Electronic)9781624107207
ISBN (Print)9781624107207
DOIs
Publication statusPublished - 4 Jun 2024
Event30th AIAA/CEAS Aeroacoustics Conference - University of Roma, Rome, Italy
Duration: 4 Jun 20247 Jun 2024
https://www.aidaa.it/aerospaceitaly2024/aiaa-ceas-aeroacoustics-conference/

Publication series

NameAIAA/CEAS Aeroacoustics Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc. (AIAA)
ISSN (Print)1946-7826

Conference

Conference30th AIAA/CEAS Aeroacoustics Conference
Country/TerritoryItaly
CityRome
Period4/06/247/06/24
Internet address

Bibliographical note

Publisher Copyright:
© 2024, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.

Fingerprint

Dive into the research topics of 'Experimental Identification of Noise Mechanisms Present in a Partially Buried BLI Ducted Fan'. Together they form a unique fingerprint.

Cite this