Parametric study of evtol rotor acoustic design trades

Daniel Weitsman, Eric Greenwood

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

Abstract

A computational framework that couples the parametric aircraft geometry tool, OpenVSP with the acoustic prediction code, PSU-WOPWOP was developed and applied to evaluate the aerodynamic and acoustic effects of variations in the design and operating conditions of eVTOL rotors in hover. While reducing disk loading is beneficial for both acoustics and hover performance, most other design changes entail a tradeoff between noise and aerodynamic efficiency. Changes in twist and taper can reduce noise by shifting loading and blade volume inboard, where convective amplification of the acoustic sources is lower. However, these changes reduce aerodynamic efficiency. Acoustically-beneficial changes to taper, twist rate, and twist distribution are combined to design a low noise rotor. Compared to the baseline, a maximum noise reduction of approximately 7dB is achieved but power loading is reduced by 15%.

Original languageEnglish (US)
Title of host publicationAIAA Scitech 2021 Forum
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
Pages1-16
Number of pages16
ISBN (Print)9781624106095
StatePublished - 2021
EventAIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2021 - Virtual, Online
Duration: Jan 11 2021Jan 15 2021

Publication series

NameAIAA Scitech 2021 Forum

Conference

ConferenceAIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2021
CityVirtual, Online
Period1/11/211/15/21

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering

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