TY - GEN
T1 - Aeroacoustic analysis of an unmanned aerial vehicle
AU - Lysak, Peter D.
AU - Dreyer, James J.
AU - Fahnline, John B.
AU - Capone, Dean E.
AU - Poremba, John E.
N1 - Publisher Copyright:
Copyright © 2007 by ASME.
PY - 2007
Y1 - 2007
N2 - An acoustic analysis of a ducted fan unmanned aerial vehicle (UAV) was conducted to identify the primary aeroacoustic sources and to determine the potential for reducing the radiated noise levels. Computational fluid dynamics was used to determine the three-dimensional flow field through the ducted fan in hover and maneuvering configurations. The flow solutions provided information about the blade relative velocities, spatially non-uniform inflow, inflow turbulence, boundary layer turbulence, and blade wake velocity deficits for use in acoustical models of broadband and blade passing frequency noise. The computational results were in good agreement with experimentally measured noise levels, and showed that the tonal noise was produced primarily by unsteady forces resulting from the non-uniform inflow, while the broadband noise resulted from the inflow turbulence. Based on these findings, design modifications were recommended which offer the potential to reduce the noise by more than 10 dB.
AB - An acoustic analysis of a ducted fan unmanned aerial vehicle (UAV) was conducted to identify the primary aeroacoustic sources and to determine the potential for reducing the radiated noise levels. Computational fluid dynamics was used to determine the three-dimensional flow field through the ducted fan in hover and maneuvering configurations. The flow solutions provided information about the blade relative velocities, spatially non-uniform inflow, inflow turbulence, boundary layer turbulence, and blade wake velocity deficits for use in acoustical models of broadband and blade passing frequency noise. The computational results were in good agreement with experimentally measured noise levels, and showed that the tonal noise was produced primarily by unsteady forces resulting from the non-uniform inflow, while the broadband noise resulted from the inflow turbulence. Based on these findings, design modifications were recommended which offer the potential to reduce the noise by more than 10 dB.
UR - https://www.scopus.com/pages/publications/44249114578
UR - https://www.scopus.com/pages/publications/44249114578#tab=citedBy
U2 - 10.1115/IMECE2007-41312
DO - 10.1115/IMECE2007-41312
M3 - Conference contribution
AN - SCOPUS:44249114578
T3 - ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
SP - 1711
EP - 1719
BT - Heat Transfer, Fluid Flows, and Thermal Systems
PB - American Society of Mechanical Engineers (ASME)
T2 - ASME 2007 International Mechanical Engineering Congress and Exposition, IMECE 2007
Y2 - 11 November 2007 through 15 November 2007
ER -