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Helicopter rotor acoustics

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Old   August 11, 2014, 12:15
Default Helicopter rotor acoustics
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Stephen O'Donnell
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Hi guys,

I'm trying to predict the acoustic noise generated from a four bladed helicopter rotor. I'm using rigid motion for the rotor's rotation and morphing motion for blade pitching motion. I'm using the On-the-fly FW-H solver to predict the acoustic noise but I it isn't working. I get the message;
"FW-H Surface: Impermeable surface 1 has boundary: blade 1 with no stationary or rigid motion"
"On-the-Fly FW-H model is only available for stationary and rigid motion"

I would be most greatful for any help in solving this problem.
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aeroacoustics, ffowcs-wiliams howkings, fw-h, on-the-fly, rigid body motion

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