Aeroacoustic study of lift offset coaxial rotor using free wake analysis

Kalki Sharma, Kenneth S. Brentner, Zhongqi Jia, Seongkyu Lee

Research output: Contribution to conferencePaper

Abstract

This paper performs aerodynamic and acoustic analysis on a coaxial rotor system based on the XH-59A coaxial helicopter. The aerodynamic analysis is performed in RCAS using free wake modeling, and the acoustic prediction is performed with PSU-WOPWOP, which utilizes Farassat’s Formualation 1A of the Ffowcs Williams-Hawkings equation. The coaxial rotor system is analyzed for forward flight speeds of 100 knots and 150 knots. For each case the rotor shaft angle and the distribution of loading is varied to understand the impact on the rotor noise and the aerodynamic environment of the rotor system. The aerodynamic environment is analyzed by wake and blade load visualization, and the noise is computed on a hemi-spherical grid 10 rotor radii from the coaxial rotor system.

Original languageEnglish (US)
Publication statusPublished - Jan 1 2019
EventVertical Flight Society's 75th Annual Forum and Technology Display - Philadelphia, United States
Duration: May 13 2019May 16 2019

Conference

ConferenceVertical Flight Society's 75th Annual Forum and Technology Display
CountryUnited States
CityPhiladelphia
Period5/13/195/16/19

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All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Control and Systems Engineering

Cite this

Sharma, K., Brentner, K. S., Jia, Z., & Lee, S. (2019). Aeroacoustic study of lift offset coaxial rotor using free wake analysis. Paper presented at Vertical Flight Society's 75th Annual Forum and Technology Display, Philadelphia, United States.