Fast prediction of ice shape based on proper orthogonal decomposition method

To predict the shapes of ice accretion on the airfoils quickly,a numerical simulation program based on the proper orthogonal decomposition (POD) method was established.Taking sample of the ice shapes from computational fluid dynamics (CFD) numerical calculation,in view of the change of icing temperature,the procedure of predicting the ice shapes by POD method was introduced.Considering the icing temperature,icing time and liquid water content,the ice shape's quick prediction was made through the POD method in the case of variation of single parameter,two parameters and three parameters separately.The calculation results indicate that the POD computation is completed in only a few seconds,and the ice shapes obtained by POD method are in good coincident with those acquired by CFD except for the ice horn.The conclusion is made that the ice shapes can be obtained quickly and accurately by the POD method.