Patent ID: 6948910

Claim:
A method of inclined-plane-based boundary layer transport implemented by forming discretely oriented convexities and concavities of such variations of angle to bulk fluid flow upon the rear working surfaces of that class of rotor blades that have the shape of rigid continuous profiled spiral or ring bands, implemented by adding progressive phase-angle fragmental increments-of-amplitude to progressive axial-plane-relative profile coordinates as can effect such surface-to-axial plane chord-wise progressive variation of change of inclination as can accelerate fluid, the shape of which is characterized by two axial-plane-relative isocline parabolas of fluid acceleration, as well as by a constant subtended angle of axial azimuth connecting successive azimuth-increment axial-section maxima of convexity, said curves and angle that together evidence such variable convexity and together comprising the steps of: a) translating the coordinates of a conventional fluid dynamic profile tail section envelope chord-wise coordinates into logarithmic coordinates defining exponential wavelength expansion isocline control points, b) constructing an amplitude expansion logarithmic spiral to offset logarithmic decrement viscous dissipation, then its corresponding parabolas of amplitude maxima, then envelope construction means and envelope reconstruction cubic spline c) progressively remapping the individual phase angle axial profile section envelope collectively into a multiplicity of individual integral multiple incremental phase angle fragments as can define a single periodic function cycle d) associating said progressive individual integral coordinate sets with the front element coordinate set of said spiral band blade such that for every increment of fundamental subtended angular change of axial azimuth of said front element, the next numbered phase angle increment-of-generation of each successive associated individual phase angle fragment shall be an integral multiple of the front element coordinate set angular change e) connecting the envelope construction rays with tangential and axial cubic spline interpolation curves or their functional equivalents to establish a continuous physical envelope shape f) constructing a plurality of said blades according to these coordinates and attaching them at various locations of a hub and such fixed support that allows said blade assembly to rotate whereby, upon rotation of the resulting continuously shape-sequenced bands through the axial shear plane multiplicity, the body-relative fluid acceleration caused by the body-relative isocline acceleration attending anguillar or carangiform propulsion of aquatic creatures is substantially duplicated through the mechanism of spaced-quadrature vector-coupling and as such, useful for the expulsion of boundary layer accumulations as well as for limiting spanwise flow, turbulence, and undulation of reaction mass.