Acoustics comparison of a novel reduced tip vortex rotary blade and a traditional blade

Diaz, Mateo

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https://hdl.handle.net/2142/114018 Copy

Description

Title

Acoustics comparison of a novel reduced tip vortex rotary blade and a traditional blade

Author(s)

Diaz, Mateo

Issue Date

2021-12-09

Director of Research (if dissertation) or Advisor (if thesis)

Saxton-Fox, Theresa

Department of Study

Aerospace Engineering

Discipline

Aerospace Engineering

Degree Granting Institution

University of Illinois at Urbana-Champaign

Degree Name

M.S.

Degree Level

Thesis

Date of Ingest

2022-04-29T21:47:45Z

Keyword(s)

• acoustics
• noise
• blade-vortex interaction
• BVI

Abstract

Acoustics data collection was performed in an anechoic chamber for two propeller blade types, one traditional power optimized blade and one novel blade designed to reduce generated tip vortex strength. Both blade types had a 7.82” radius, a 2.25” root chord, a taper ratio of 2, a thrust coefficient of 0.003, and used an Eppler E387 airfoil. The blades were held at a steady 5000 rotations per minute as data were captured at 11 different microphone locations downwind of the rotor disc. Data were processed using a Fourier transform and analyzed. Key peaks in the processed data were identified and compared for each blade type and microphone location. Compared to the power optimized blade, the reduced vortex blade was found to have a greater number of distinct peaks. Additionally, for peaks that were present in the acoustic signatures of both blade types, the reduced vortex blade’s peaks were slightly greater in magnitude on average.

Graduation Semester

2021-12

Type of Resource

Thesis

Permalink

http://hdl.handle.net/2142/114018

Copyright and License Information

Copyright 2021 Mateo Diaz

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