Boundary element analysis on the fuselage scattering of drone noise

Hanbo Jiang, Siyang Zhong, Xin Zhang, Xun Huang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

Abstract

Multi-rotor powered drones and urban mobility vehicles (UMV) have received considerable attention over recent years and attracted ever-increasing interest in their aerodynamic noise. Physics-based prediction tools for aerodynamic noise are of importance to facilitate quiet drone designs. In this work, a boundary element method (BEM) based solver is employed to evaluate the scattering of the rotor noise of a flying drone fuselage. The possible non-uniqueness of the solution is tackled using a Combined Helmholtz Interior integral Equation Formulation (CHIEF). The proposed method is applied to evaluate the noise scattering by a realistic fuselage configuration. Results suggest that the fuselage can visibly redirect propeller noise radiation at low frequencies because of wave diffractions. The fuselage can also affect the sound field by wave reflections at high frequencies, producing an apparent noise reduction.

Original languageEnglish
Pages (from-to)43-56
Number of pages14
JournalInternational Journal of Aeroacoustics
Volume21
Issue number1-2
DOIs
Publication statusPublished - Mar 2022
Externally publishedYes

Keywords

  • acoustic scattering
  • Boundary element method
  • drone/UMV noise

ASJC Scopus subject areas

  • Aerospace Engineering
  • Acoustics and Ultrasonics

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