DTIC AD0636928: APPROXIMATE SOLUTIONS FOR COMPUTING HELICOPTER pdf

DTIC AD0636928: APPROXIMATE SOLUTIONS FOR COMPUTING HELICOPTER

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Assuming a constant circulation, rigid, trailing wake and using a lift deficiency function to represent the unsteady aerodynamic effects, various methods of calculating the airloads on a helicopter rotor in steady, forward flight were developed for the purpose of achieving: (a) faster solution times for a given level of accuracy and (b) a more accurate representation of the lifting surface/vortex interaction for the case where the blade passes close to the vortex line generated by a previous blade. Since most of the solution time is required to calculate the induced velocities due to the trailing wake, various approximate methods of calculating the induced velocities due to a rigid, skewed helix were developed

• Creator/s: Defense Technical Information Center
• Date: 12/1/1965
• Year: 1965
• Book Topics/Themes: DTIC Archive, , MASSACHUSETTS INST OF TECH CAMBRIDGE AEROELASTIC AND STRUCTURES RESEARCH LAB, *HELICOPTERS, *AERODYNAMIC LOADING, HARMONIC ANALYSIS, WAKE, HELICOPTER ROTORS, VORTICES, APPROXIMATION(MATHEMATICS

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