基于特征正交分解法的翼型结冰冰形快速预测

为加快翼型结冰冰形的计算速度,提出了一套基于特征正交分解(POD)法的结冰冰形快速预测算法.通过计算流体动力学(CFD)数值模拟计算得到的冰形结果作为样本,以结冰温度单参数变化时为例,详细介绍了POD法预测结冰冰形的实现步骤.考虑结冰温度、结冰时间以及液态水含量的影响,完成了单参数、两参数与三参数变化时的POD结冰冰形快速预测.通过算例结果发现:完成POD预测计算只需几秒钟且POD法与CFD法得到的冰形吻合较好,仅在冰角附近有较小差别,表明POD方法能够快速、准确地得到翼型的结冰冰形. 

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.