The method takes advantage of bezier curve to work out a set of blade profiles of centrifugal pump , using thickening law to thicken the profiles . then the pressure and suction lines of the blade can be obtained . it takes advantage of bezier surface to create pressure and suction surface and makes use of mdt software to create the three - dimensional blade entity 首先采用速度系数法计算得到离心泵叶轮的基本参数,再由b zier曲线生成一组叶轮叶片型线,按照加厚原理对型线进行加厚,得到正背叶片线,再采用张量积b zier曲面生成叶片正背面,由mdt进行三维实体造型得到叶片,从而得到流场计算区域的模型。