水上飞机水面降落全过程力学特性数值研究

数值方法模拟水上飞机的水面降落运动姿态和受力的全过程，是结合了水汽两相流、运动学和动力学的复杂问题。采用基于Fluent商用软件开发的整体运动网格方法结合VOF方法进行自由面捕捉，采用六自由度模型进行运动状态模拟，对某型水上飞机水面降落的全过程进行了数值模拟，得到了较好的模拟结果，验证了整体运动网格方法在处理水上飞机水面降落问题时具备良好的适应性。通过模拟得到过载曲线、运动状态参数和水面状况，将降落过程划分为冲击、滑水、漂浮3个阶段，并通过对各阶段的分析总结出对水面降落过程的一般性认识，以期为水上飞机的设计研发提供方法和参考。 

Numerical study on mechanical properties of seaplane in whole water surface landing process

The numerical method is used to simulate the whole process of seaplane landing movement attitude and force, which is a complex problem combining water vapor two-phase flow, kinematics and dynamics. In this paper, the global motion grid method based on Fluent commercial software is combined with VOF method for free surface capture and six-degree-of-freedom model for motion state simulation. The numerical simulation of the water surface landing of a certain type of seaplane is carried out. The simulation results verify that the overall motion grid method has good adaptability when dealing with the surface landing problem of seaplanes. Through the simulated overload curve, motion state parameters and water surface condition, the landing process is divided into three stages:impact, water skiing and floating. Through the analysis of each stage, the general understanding of the water surface landing process is summarized. Methods and references are provided for the design and development of seaplanes.