论文信息 - DESIGN AND HOVER TEST OF LOW VIBRATION MACH SCALE ROTOR WITH TWISTED COMPOSITE TAILORED BLADES

DESIGN AND HOVER TEST OF LOW VIBRATION MACH SCALE ROTOR WITH TWISTED COMPOSITE TAILORED BLADES

Several different Mach scale model rotors with composite tailored blades were designed for reduction of vibratory hub loads. Comprehensive aeroelastic analysis shows that a non-uniform spanwise segmented composite flap-bending/torsion coupling distribution can lead to reduced vibratory hub loads in forward flight. Two Mach scale rotor sets with pre-twisted composite tailored blades (baseline and optimum coupling) were fabricated. Static bench-top tests and dynamic tests were carried out to validate the structural analysis of these composite blades. The rotors were tested up to the nominal rotor speed of 2300rpm (with tip Mach number 0.65) on the hover stand. Predicted rotor thrust matched the test data in hover.

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