科研之友
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摘要
Induced power computations are much easier to perform in the case of an infinite number of blades than they are for a finite number of blades. This is because low-order actuator-disk concepts can be employed for rotors in which the induced flow is assumed to proceed from an infinite number of blades, whereas either high-order actuator disks or vortex-lattice methods are required for rotors with induced flow emanating from a finite number of blades. Therefore, it would be helpful to have approximate correction factors that could be applied to infinite-blade results to capture the effect of blade number on induced power. (Prandtl's famous tip-loss function for rotors is an example of such a correction.) We use results from Prandtl and Goldstein, our own finite-state inflow results, and other induced-power computations in the literature to create such a correction function, useful at all wake skew angles from hover to edgewise flow. Applications to induced power computed by a finite-state method are also given.
- 出版日期2017-7
