Numerical research on slamming characteristics of aircraft landing on water  

作　　者：Dao-sheng Ning Ya-jun Shi Gui-yong Zhang Heng Wang Huan Hu Zhi-fan Zhang 

机构地区：[1]State Key Laboratory of Structural Analysis for Industrial Equipment,School of Naval Architecture Engineering,Dalian University of Technology,Dalian,116024,China [2]China Ship Scientific Research Center,Wuxi,200136,China [3]Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration,Shanghai,200240,China [4]State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing,100081,China

出　　处：《Journal of Hydrodynamics》2023年第1期171-184,共14页水动力学研究与进展B辑（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.52061135107);This work was supported by the Liao Ning Revitalization Talents Program(Grant No.XLYC1908027);the Fundamental Research Funds for the Central Universities(Grant Nos.DUT20TD108,DUT20LAB308 and DUT20RC(3)025);the opening project of State Key Laboratory of Explosion Science and Technology(Grant No.KFJJ21-09M).

摘　　要：In order to investigate the impact characteristic of an aircraft landing on water,a computational fluid dynamics(CFD)simulation is conducted to explore the slamming characteristics of the NACA TN 2929 A model.The flow around the model is solved by using Reynolds-averaged Navier-Stokes equations with the shear stress transport(SST)k—ωturbulence model,based on finite volume method(FVM).The free surface is captured by using the volume of fluid(VOF)method,and the aircraft impact process is realized with help of overset mesh technology.Then,the effects of horizontal and vertical velocities and initial pitch angle on the slamming load,attitude change,impact pressure and flow field evolution are investigated.The results reveal that the horizontal velocity has a considerable influence on whether the aircraft’s horizontal tail hits the water,and further affects the maximum vertical load as well as the maximum pitch angle throughout the impact process.The vertical velocity determines the slamming load before the horizontal tail strikes the water,while the horizontal velocity has a significant effect on the load after the horizontal tail hits the water.A smaller initial pitch angle results in not only a heavier slamming load but also a more dramatic change of the posture after the aircraft impacts the water.The impact pressure of the aircraft is maximized at the junction of the approaching surface of the fuselage and the free surface.In some cases,the pressure is also concentrated on the undersurface of the horizontal tail.

关 键 词：Computational fluid dynamics(CFD) aircraft landing water entry slamming load motion attitude change 

分 类 号：TV131.2[水利工程—水力学及河流动力学]