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为计算发动机进气道短舱前缘的结冰冰形,在Messinger结冰热力学模型的基础上发展了一套纯三维的表面溢流水流动结冰模型。考虑空气摩擦力为表面溢流水流动的主要驱动力,用空气对进气道表面的剪切力来确定溢流水的流动方向及流量分配。为求解溢流水结冰模型,发展了一套重复查找表面控制体状态的方法,能够快速完成整个三维表面的计算。用该方法对某三维发动机进气道进行计算,得到了三维结冰冰形,并将计算结果与FENSAP-ICE计算结果进行了对比,结果显示两者的冰形轮廓基本一致,仅在冰角处存在差异,表明本文三维发动机结冰计算模型与计算方法是有效的,其计算精度与FENSAP-ICE结果相当。
In order to calculate the icing ice shape on the leading edge of the engine intake nacelle, a set of pure three-dimensional surface-overflow water flow icing model was developed based on the Messinger icing thermodynamic model. Considering the frictional force of the air as the main driving force for the flow of surface overflow water, the flow direction and flow distribution of the overflow water are determined by the shear force of the air on the air intake surface. In order to solve the model of overflowing water icing, a set of method to find the state of surface control repeatedly was developed, which can quickly calculate the whole three-dimensional surface. By using this method, a three-dimensional icing ice shape is obtained by calculating the inlet of a three-dimensional engine, and the calculation results are compared with those of FENSAP-ICE. The results show that the two ice profiles are basically the same, The results show that the calculation model and calculation method of icing in three-dimensional engine are effective, and the calculation accuracy is equivalent to that of FENSAP-ICE.