Analytical treatment for case of hovering flight results in simple closed-form solution that demonstrates that oscillatory lift under normal operating conditions can be less than 50% of its quasi-static value; it is shown that air loads in forward flight depend primarily on equivalent lift deficiency and downwash generated by steady-state blade vortex system; at low speeds, rotor wake can be drawn up into rotor leading edge and this is probably primary cause of transition roughness and noise encountered under certain flight conditions.
Rotor blade harmonic air loading
AIAA J
AIAA Journal ; 2 , n 7
1964
16 pages
Article (Journal)
English
© Metadata Copyright Elsevier B. V. All rights reserved.
Rotor blade harmonic air loading
AIAA | 1964
|High speed rotor noise due to blade loading
AIAA | 1986
|