Guide edge deformation bionic propeller parameterized deformation method based on exponential decay curve

Abstract

The invention provides a guide edge deformation bionic propeller parameterization deformation method based on an exponential decay curve. The method specifically comprises the following steps that S1, the exponential decay curve is constructed according to the concave-convex shape of the front edge of a spermaceti fin-shaped limb of a seat head; s2, selecting a standard paddle to carry out three-dimensional parametric modeling, and then adjusting the guide edge shape of the standard paddle into the shape of the exponential decay curve constructed in the step S1; s3, defining the exponential decay curve equation obtained in the step S1 to advance in a sine function mode in the x direction, and controlling the total length of a curve combination in the z direction; defining two exponential decay curves arranged in the z direction according to the extension range of the seat head whale fin and the concave-convex shape of the front edge of the seat head whale fin; connecting the two exponential decay curves by using an F-spline function to obtain an overall deformation curve; and S4, adjusting the shape of the guide edge of the standard paddle obtained in the step S2 into the shape of the overall deformation curve. By means of the exponential decay curve, the concave-convex structure of the anterior fin of the seated cetella can be simulated more vividly and accurately.

Description

technical field [0001] The invention relates to the technical field of ship propulsion, in particular to a parameterized deformation method of a bionic propeller based on leading edge deformation based on an exponential decay curve. Background technique [0002] In 2011, Zhang Ruikui of Peking University and others applied the concave and convex of the guide edge to the blade of the wind turbine. The leading edge of the wind turbine blade is designed in a sinusoidal shape, and the calculation results show that the concave-convex leading edge blade improves the torque at higher wind speeds compared with the straight leading edge blade. The local vortex shedding generated by the concave-convex guide edge can generate higher suction pressure at the peak of the guide edge, thereby improving the aerodynamic performance of the blade. As the wavelength and amplitude of the sinusoidal curve of the concave-convex leading edge increase, the output power of the blade also increases. ...

AI Technical Summary

Problems solved by technology

However, optimization methods using parametric modeling are still lacking in the prior art

Images