Passive yaw damping of a teetered rotor versus delta-3 angle values
Technical Report
·
OSTI ID:5264614
A series of preliminary experiments has been completed to delineate the combinations of passive cyclic pitching conditions which are favorable. The conditions surveyed have included: upwind and downwind modes of operation; a wide range of delta/sub 3/ angle settings, from +70/sup 0/ to -70/sup 0/; rotor angular speeds from 300 to 750 rpm and the resulting ranges of teeter angles and yaw rates. Negative settings of the delta/sub 3/ angle and large positive delta/sub 3/ values caused pronounced instabilities for both upwind and downwind modes. With delta/sub 3/ angle settings from 0/sup 0/ to 45/sup 0/ the teetered rotor in the downwind mode ran at a continuous yaw angle to the free stream wind. Midrange delta/sub 3/ angle values for an upwind, tailvane stabilized, rotor were favorable.
- Research Organization:
- Missouri Univ., Kansas City (USA). Dept. of Physics
- DOE Contract Number:
- FG47-81R701221
- OSTI ID:
- 5264614
- Report Number(s):
- DOE/R7/01221-T1; ON: DE84009758
- Country of Publication:
- United States
- Language:
- English
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