The present invention relates to a control device in order to slow down the angular speed and discontinue the movement of rotation of a rotor of helicopter, by means of a brake of the rotor, in a position in azimuth selected, comprising a controller of deceleration 23 which controls the ...
The positions of the Lagrangian markers are defined as a function of the blade azimuth angle (ψ) and wake age (ζ). Thus, the initial helical wake structure will change as the markers convect downstream. The rate of change of the Lagrangian markers’ position can be expressed in the partia...
The speed regulation wind turbine realizes the flexible connection of the drive chain and alleviates the impact load to a certain extent. However, there are still some disadvantages, such as large volume, high cost, large converter capacity and narrow operation range of variable speed constant frequ...
It is understood that ##EQU2## represents the angular position of the nth blade, in an equally distributed configuration, whereas ##EQU3## corresponds to the azimuth modulation term with respect to the equally distributed configuration. The parameters m and ΔΘ are chosen as a function of th...
Several porosity values ranging from 0.0 to 0.9 with variations in the angular positions from 60° to 120° were evaluated in their study, conducted on a two-dimensional domain using the SSTk-ω model. They observed that the porous deflector outperformed the flat plate solid deflector. They ...
. This will be determined based on the flight conditions where yaw control is to be provided. Flight conditions include such parameters as airspeed, descent rate, weight, altitude, atmospheric conditions etc. In addition, the method may include identifying a second rotor pitch control azimuth range...
where 𝑃𝑜𝑢𝑡Pout is the output power, 𝑘𝑠ks is a sizing constant, 𝐷𝑟−𝑜𝑢𝑡Dr−out is the rotor outer diameter, L is the stack axial length and 𝜔ω is the rated angular speed. In terms of torque components, the following equation applies, 𝑇=𝑖𝑑...
During the movement of the rotor drone target, the scattering point in the rotor rotates around the center of the rotor at an angular velocity ω. The azimuth and pitch angles of the rotor relative to the radar are α and β, as shown in Figure 2. Figure 2. The geometric diagram of ...
While for the experimental data only segments of the rotor wake covering 16∘ of the rotor azimuth were measured, the numerical data were evaluated for 360∘ azimuth. In total, five revolutions were evaluated that were resolved with time steps of 1∘ resulting in 1800 velocity fields at ...
PURPOSE: To make improvements in aerodynamical efficiency by controlling a momentary geometrical angle of respective profiled blades into its angular azimuth secured to the blade. CONSTITUTION: This is such a type as rotating a rotor at rotation speed ωaround a rotation axis O in a fluid, and...