UHBR Engine and Ducted Propulsor Noise Reduction Technology for Future Aircraft

A special issue of Aerospace (ISSN 2226-4310). This special issue belongs to the section "Aeronautics".

Deadline for manuscript submissions: closed (6 December 2024) | Viewed by 2854

Special Issue Editors


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Guest Editor
School of Power and Energy, Northwestern Polytechnical University, Xi’an 710129, China
Interests: turbomachinery aeroacoustics; noise prediction; noise control; turbomachinery aerothermal dynamics

E-Mail Website
Guest Editor
School of Power and Energy, Northwestern Polytechnical University, Xi’an 710129, China
Interests: aeroacoustics; bionic noise reduction; noise prediction; propeller noise; noise measurement
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Special Issue Information

Dear Colleagues,

Ultra-high bypass ratio (UHBR) engines and ducted propulsors are indispensable power devices for future aircraft. For UHBR engines and ducted propulsors, the forward and afterward radiating fan noise is one of the most important noise sources. Three primary noise sources of the fan are the rotor-stator interaction tonal noise, turbulence broadband noise and shock noise. Advanced noise reduction technology for fans could contribute significantly to future ultra-quiet engines and aircraft. In order to further reveal noise generation mechanisms and reduce noise pollution, it is urgent to conduct systemic research and develop advanced noise reduction technologies for UHBR engines and ducted propulsors.

Potential topics include, but are not limited to:

  • The noise characteristics of a ducted fan;
  • Fan noise prediction;
  • Fan noise reduction;
  • The advanced computational aeroacoustics method;
  • The advanced computational aerodynamics method;
  • The advanced noise measurement method.

Prof. Dr. Weiyang Qiao
Dr. Weijie Chen
Guest Editors

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Keywords

  • UHBR engines
  • ducted fan
  • aeroacoustics
  • noise prediction
  • noise reduction
  • noise measurement

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Published Papers (2 papers)

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Research

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14 pages, 1413 KiB  
Article
Aeroacoustic Study of Synchronized Rotors
by Fabio Del Duchetto, Tiziano Pagliaroli, Paolo Candeloro, Karl-Stéphane Rossignol and Jianping Yin
Aerospace 2025, 12(2), 162; https://doi.org/10.3390/aerospace12020162 - 19 Feb 2025
Viewed by 502
Abstract
The main goal of the present study is to explore the noise mitigation potential using an active control strategy based on rotor phase synchronization. This work is focused on the effects of the inflow velocity on the noise interference effect. The inflow velocity [...] Read more.
The main goal of the present study is to explore the noise mitigation potential using an active control strategy based on rotor phase synchronization. This work is focused on the effects of the inflow velocity on the noise interference effect. The inflow velocity does not affect the phase at which the interference phenomenon is observed, as expected. On the other hand, the intensity of the pressure fluctuations is influenced by the inflow velocity for all of the rotor phase shift conditions investigated. Specifically, as the inflow velocity increases, maintaining a constant rotational speed, in the Overall Sound Pressure Level graphs, a reduction of approximately 10 dB is observed. This effect also applies to cases of destructive interference, highlighting the remarkable versatility of this noise reduction technique. Full article
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Review

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28 pages, 29687 KiB  
Review
Serrations as a Passive Solution for Turbomachinery Noise Reduction
by Andrei-George Totu, Grigore Cican and Daniel-Eugeniu Crunțeanu
Aerospace 2024, 11(4), 292; https://doi.org/10.3390/aerospace11040292 - 9 Apr 2024
Cited by 3 | Viewed by 1767
Abstract
Aircraft engine noise has become a significant concern for air operators to address. Engineering strategies have resulted in the development of easily applicable solutions, known as “passive solutions”, that do not necessitate real-time control. These solutions include the incorporation of corrugations or cutouts [...] Read more.
Aircraft engine noise has become a significant concern for air operators to address. Engineering strategies have resulted in the development of easily applicable solutions, known as “passive solutions”, that do not necessitate real-time control. These solutions include the incorporation of corrugations or cutouts at critical locations on the engine’s aerodynamic surfaces. Realistic solutions, whether approached numerically or tested at small scales, as well as computational models, have been found to closely match experimentally observed behaviors, both in 2D and 3D scenarios. The identified geometries serve as promising starting points for devising combined concepts that may offer even better performance under specific flow conditions. Full article
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