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机翼结冰是威胁民用飞机飞行安全的主要因素之一,准确预测机翼的结冰过程和特点,可为防除冰设计提供依据和支撑。提出了利用二维模拟三维的准三维冰形算法,该算法在保证结冰预测精度的同时,极大地降低了型号结冰计算成本;给出了顺气流和垂直于前缘两种典型民用飞机后掠翼机翼的二维剖面截取方法,并将采用该方法的计算结果与三维后掠机翼的结冰预测结果进行了对比分析。结果表明,相对于顺气流方式,垂直于前缘方式的准三维冰形算法与三维后掠机翼的结果更为接近。
Airplane icing is one of the main threats to flight safety of civil aircraft. Accurately forecasting the icing process and characteristics of the airfoil can provide basis and support for the ice design. A three-dimensional quasi-three-dimensional ice-shape algorithm is proposed which simulates three-dimensional ice-making. The algorithm not only guarantees the icing prediction accuracy, but also greatly reduces the calculation cost of icing model. The method of two-dimensional section interception of the wing of the swept-back wing is compared with that of the three-dimensional swept wing. The results show that the quasi-three-dimensional ice-shape algorithm perpendicular to the leading edge is more similar to the 3D swept wing than the downwind method.