Dynamics of VTOL rotor at rolling up
Department of FV Structural Mechanics.
Kazan State
Technical University named after A.N.Tupolev
K.Marx St.,
10, Kazan, 420111, Republic of Tatarstan, Russia
Starting with the fifties of the last century, the R&D (research and development) companies in a number of countries make numerous attempts to create the high-speed flying vehicles with vertical take-off and landing, the so-called VTOLs (vertical take-off and landing airplanes). The VTOLs are much more complicated in structure as compared with the conventional airplanes; for this reason, the creation of such a vehicles is a challenge.
A team of specialists from the Kazan State
Technical University has been deeply involved in the VTOL design. The VTOL
structure uses the disk wing-turbine; in helicopter regimes conditions, the
blades are extended (for rotor rotation, the wing mounted jet drive is used).
In transition to high-speed level flight, the blades are retracted, and the
vehicle flies as the ordinary airplane.
The
original design of VTOL power plant makes its structure simple in fabrication,
light-weight, and relatively cheap. The rotor twisting is carried out in
accordance with the scheme, where the kinetic energy of rotation is used to retract
the blades inwardly. The main objective of this paper is the examination of
VTOL rotor twisting at flight conditions.
In
this paper, we consider some problems of VTOL (vertical take-off and landing
airplane) rotor twisting in flight. The rotor assembly of the vehicle consists
of the disk wing and internal drum rotating about one and the same axis, and
also the extended blades connected with the drum by cables. The equations of
motion are written for the case when all bodies are absolutely solid and the
blades perform the 3-d motion, while the elastically-fixed rotor axis perform
the 2-d motion. Also presented are the results of numeric calculations.