Abstract
To constructed turbine blade efficiently and accurately, NURBS is adopted to fit the turbine blade surface. The cross section and longitudinal node vectors are computed using the centripetal parameter method and the accumulation chord length parameter method separately. The accurate mathematics model of blade is built with non-uniform rational B-spline based on control points and node vector. The matrix expression is also given. The example shows the blade mathematics model satisfies the accuracy requirement completely. It has the practical application value to enhance the blade design quality and carry on the blade dynamic analysis.
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