The invention relates to a method to adjust the pitch angle of blades of a wind turbine, which is especially used if the aerodynamic performance of the wind turbine blades is influenced by weather conditions.Christiansen Per MoelhaveEsbensen Thomas...
叶片间距指数角。刀片间距指角数距角指数间刀片
angle of pitch[′aŋ·gəl əv ′pich] (aerospace engineering) The angle, as seen from the side, between the longitudinal body axis of an aircraft or similar body and a chosen reference line or plane, usually the horizontal plane....
美 英 un.桨叶角 英汉 un. 1. 桨叶角
26. the pitching motion of a ship, missile, etc 27. (Aeronautics) a. the distance a propeller advances in one revolution, assuming no slip b. the blade angle of a propeller or rotor 28. the distance between the back rest of a seat in a passenger aircraft and the back of the seat...
In passive strategies, the blade design itself assures the turbine works within safe limits at any wind speed. Although these strategies are simple and inexpensive, they cause high stationary loads and loss of energy [1]. The active strategies consist in varying the pitch angle of the blades. ...
(1) Large initial blade angle (+9 ), excellent acceleration performance, start at low wind speed of 2.5m/s; (2) Below the rated wind speed, the wind turbine outputs efficiently; (3) Above the rated wind speed, adjust the pitch angl...
To check the pitch or blade angles of the propeller, usual practice has been to remove the propeller from the engine and put it. on a level table and read the blade angles by means of an ordinary protractor. With the great increase in size, weight, and height from the ground of the ...
Therefore, a number of investigations on effects of blade pitch angle had been conducted, coming into being passive variable-pitch and active variable-pitch methods. The passive variable-pitch method, where the blade pitch angle was adjusted by aerodynamic or inertia forces on blade, was...
Nevertheless, blade pitch angle can be controlled and so, in this study, the blade pitch angle of a model-scale HATT has been incrementally adjusted while operating in different wave-current flows and the resultant effects on loading and power output have been measured. The model turbine uses ...