水陆两栖飞机全机模型静水滑行水动性能预报

Hydrodynamic Performance Prediction of Full-aircraft Model of Amphibious Hydroplane

水面起飞性能是水面飞行器的基本性能,也是总体技术的核心,涉及多个学科领域。水陆两栖飞机水面高速滑行水动力性能与排水型船不同,具有速度高、运动复杂等特点,高速滑行时一方面受到较大的水动升力,另一方面受到机翼的升力。结合水陆两栖飞机水面高速滑行特点,利用雷诺平均法(Reynolds average navier-stokes, RANS)数值方法和重叠网格技术对水陆两栖飞机全机模型开展数值仿真模拟,分析了自由液面水气分布、机身底部压力分布特征,并将阻力、姿态和升沉与水池模型试验结果进行对比,验证了数值方法的准确性,为水陆两栖飞机静水滑行水动性能数值预报提供技术基础。

Water surface takeoff performance is the basic performance of surface aircraft,and it is also the core of the overall technology,involving multiple disciplines.The hydrodynamic performance of amphibious hydroplane at high speed taxiing on the still water surface is different from that of displacement boats,with high speed and complex movement characteristics,and it is subject to greater hydrodynamic and wing lift.Combines with the characteristics of high-speed taxiing on the surface of amphibious hydroplane,the numerical simulation of the whole aircraft model of amphibious aircraft was carried out by using RANS numerical method and overlapping grid technology.It analyses the characteristics of free liquid surface water vapor distribution and pressure distribution at the bottom of the fuselage,and compares the resistance,attitude and heave with the test results,which verifies the accuracy of the numerical method and provides a technical basis for the numerical prediction of hydrodynamic performance of hydrostatic taxiing of amphibious hydroplane.