采用泛克里金技术的叶片表面压力场插值方法

Interpolation of Blade Surface Pressure Field Based on Universal Kriging

利用泛克里金技术对叶片表面压力场进行插值,采用球形模型,用循环交叉验证法确定变异函数.结果表明:应用泛克里金技术进行压力场插值得出的气动压力过渡较平滑,精度达到工程应用要求,并且克服一般距离加权插值方法插值结果不稳定的问题;如果插值过程中,要提高精度可适当地增加已知数据点,特别是增加在变化比较剧烈的局部位置.

The universal Kriging interpolation method is used for the interpolation of blade surface pressure field and the spherical model and cross-validation method are applied to determine variogram.The results show that the universal Kriging interpolation method makes the aerodynamic force of pressure field transmit smoothly,which meets the engineering requirements and it also overcomes the instability of the general distance weighted interpolation method.If the accuracy will be improved,the number of the original press points,should be increased especially in the place where the change of press is acute.