科研之友
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摘要
To improve the hydromechanical performance, sturgeon was chosen as the research object in this study, and a body surface structural model was built using 3D reverse engineering technology. An inhomogeneous B-spline curve fitting technique based on local refining was proposed. Meanwhile, three different bionic hydrofoils were designed and compared with three bionic hydrofoils gained from the least square method and NACA0015. Research results demonstrated that the new curve fitting technology can fit a high-accuracy hydrofoil (error < 7 x 10(-4)) by using only 15 control points, and the gained bionic hydrofoil has a good lift-drag ratio. With the bionic hydrofoils gained from the new curve fitting technology, the separation point of the laminar boundary layer moves toward the trailing edge of the hydrofoils, and the structure of the reflux eddy is refined. When two bionic hydrofoils were applied to the pump impeller structure, compared with NACA0015, the propulsive water jet pump designed using the bionic hydrofoil gained from the new cutting fitting technology is in the scope of 0.8qth-1.2qth, the head and efficiency are increased by about 7.05 % and 2.22 %, respectively.
