Propeller Influence on Surface Pressure Fluctuation Under Boundary Layer Ingestion Condition

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademic

Abstract

Research on propeller noise under boundary layer ingestion condition is essential for designing new aircraft concepts. Measurements of pressure spectra on a flat plate below a propeller give important information about the noise coming from the blades. These also are important for designing surface noise mitigation structures, such as acoustic black holes, meta-materials, and liners. This paper investigates the effects of a propeller on the flat plate surface pressure under boundary layer ingestion, using bottom of the wind tunnel channel as flat plate. Tripping devices on the wind tunnel bottom wall control the boundary layer thicknesses. The surface pressure is measured using an instrumented plate positioned underneath the propeller. The plate has 87 pressure taps to measure the unsteady and steady pressure using the remote microphone probe (RMP) technique. The results show the influence of the propeller inflow, the advance ratio, and the number of blades on the different regions underneath the propeller, and on coherent turbulent structures of the incoming flow. The boundary layer thicknesses affects the static pressure upstream of the propeller - creating high pressure regions. The propeller affects the turbulent structures downstream of the blades, increasing its correlation length.
Original languageEnglish
Title of host publicationINTER-NOISE and NOISE-CON Congress and Conference Proceedings
PublisherInstitute of Noise Control Engineering
DOIs
Publication statusPublished - 30 Nov 2023
Event52nd International Congress and Exposition on Noise Control Engineering, Inter-noise 2023 - Chiba, Greater Tokyo, Japan
Duration: 20 Aug 202323 Aug 2023
Conference number: 52

Conference

Conference52nd International Congress and Exposition on Noise Control Engineering, Inter-noise 2023
Abbreviated titleInter-noise 2023
Country/TerritoryJapan
CityChiba, Greater Tokyo
Period20/08/2323/08/23

Keywords

  • NLA

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