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针对过冷大水滴(SLD)撞击结冰表面的飞溅现象,开发了基于欧拉法的二维算法程序,该程序将LEWICE飞溅模型和FENSAP飞溅模型耦合到水滴流场控制方程中进行求解,实现了对SLD撞击特性的准定常计算。根据水滴飞溅模型中对于飞溅生成子水滴质量和速度等信息的定义,通过定义控制方程中的源项,将其耦合到控制方程的求解中,进而研究水滴飞溅效应对于撞击特性的影响。研究发现,由于水滴的飞溅作用,导致翼型壁面附近的液态水含量(LWC)分布发生变化;通过对上述两种典型的SLD飞溅模型进行计算分析,发现了SLD撞击特性的一些共性和不同,并揭示了SLD撞击效应的一般特点。
Aiming at the splashing phenomenon of the iced SLD impinging on the icing surface, a two-dimensional algorithm based on Eulerian method was developed. The program coupled the LEWICE splash model and the FENSAP splash model to the droplet flow field control equation to solve the problem. The quasi-constant calculation of the impact characteristics of SLD. According to the definition of the information such as mass and velocity of spatter-generating water droplets in the droplet splashing model, the source term in the control equation is defined and coupled to the governing equations to investigate the influence of water droplet spattering on the impact properties. It is found that the distribution of liquid water content (LWC) near the airfoil wall changes due to the splash effect of water droplets. Some common and different characteristics of SLD impact properties are found through the calculation and analysis of the above two typical SLD splash models. And reveals the general characteristics of SLD impact effect.