In the case of a multi-bladed rotor the lift deficiency function is replaced by a lift deficiency matrix (LDM). The elements of the LDM describe inter-blade aerodynamic influences. In the present paper the influence of various parameters on the elements of the LDM is investigated. These parameters include: The ratio between the frequency of perturbations and the rotor angular speed, the number of blades, various physical effects, thrust coefficient and details of the modeling. It is shown that inter-blade influences are strong and using an equivalent single blade representation instead of an accurate multi-blade modeling, may lead to errors.
The lift deficiency matrix of a hovering helicopter rotor
Auftriebsdefizitmatrix eines Hubschrauberrotors im Schwebeflug
European Rotorcraft Forum, 23 ; 1 ; 1-10
1997
10 Seiten, 6 Bilder, 16 Quellen
Conference paper
English
The Lift Deficiency Matrix of a Hovering Helicopter Rotor
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