A Parameterized Control Method for the Blade Geometry of a Two-way Full Through-flow Runner
A runner blade, parametric technology, applied in geometric CAD, design optimization/simulation, CAD numerical modeling, etc., can solve problems such as difficult to carry out optimized design, inconvenient modification of three-dimensional geometric shape, etc., to optimize work efficiency, time interval Short and easy process
Active Publication Date: 2021-12-17
XIAN UNIV OF TECH
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[0003] The purpose of the present invention is to provide a parametric control method for the geometric shape of the two-way full-through flow runner blade, which solves the problems of inconvenient modification of the three-dimensional geometric shape of the existing two-way full-through flow runner blade and difficulty in carrying out optimal design
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[0054] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0055] A parametric control method for the geometric shape of a two-way full-through flow runner blade according to the present invention mainly controls the three-dimensional curved surface of the full-through flow runner blade, and its main steps are as follows:
[0056] Step 1. Decompose the existing three-dimensional blade of the full-through flow runner into N three-dimensional airfoils on different flow surfaces, and extract the inlet and outlet angles and the lengths of the inlet and outlet control sides of the airfoils on each flow surface.
[0057] Step 1.1, as in figure 1 As shown, for an existing fully through-flow runner, in the runner axial flow channel diagram, N axial streamlines (N≥7) are taken from the hub to the rim, including the hub and rim curves Axial streamlines formed. The number of the hub streamline is 0, the numbe...
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The invention discloses a parametric control method for the geometric shape of bidirectional full-through-flow runner blades, which specifically includes the following steps: Step 1, decomposing the existing three-dimensional full-through-flow runner blades into N different flow surfaces 3D airfoil, and extract the inlet and outlet placement angles and inlet and outlet control side lengths of the airfoil on each flow surface; step 2, parameterize the results obtained in step 1; step 3, based on the processing of step 2 As a result, the set of parameter control variables is obtained; step 4, based on the results obtained in step 3, the parameter control points are processed to obtain the parameterized control variable set of the full-through flow runner blade; step 5, in the two-way full-through flow runner In the process of blade optimization, given the values of all the variables in the set of real numbers, the modeling of the three-dimensional full-through flow runner blade corresponding to the set of real numbers can be completed. The invention solves the problem that it is inconvenient to modify the three-dimensional geometric shape of the blades of the existing two-way full-through flow runner.
Description
technical field [0001] The invention belongs to the technical field of fluid machinery and marine engineering equipment, and relates to a parameterized control method for the geometric shape of bidirectional full-through flow runner blades. Background technique [0002] The two-way full-through flow turbine is a fluid machine used for ocean tidal power generation. Its main advantage is that it can realize the energy conversion of water flow under the condition of forward and reverse flow. The runner is the core component to realize the energy conversion of the two-way fully-through flow turbine. In order to improve the hydraulic performance of the forward and reverse flow, the runner blade needs to be frequently modified in the geometric model during the design and optimization process, and the runner blade is For a complex three-dimensional twisted surface, conventional surface modification methods cannot directly modify the hydrodynamic geometric variables of the three-dim...
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IPC IPC(8): G06F30/17G06F30/20F03B3/12G06F111/10
CPCG06F30/17G06F30/20F03B3/121G06F2111/10Y02E10/20
Inventor 朱国俊罗兴锜冯建军
Owner XIAN UNIV OF TECH