基于计算流体动力学方法的两栖飞机规则波中运动特性研究
Research on the take-off motion characteristics of amphibious aircraft in regular waves based on the computational fluid dynamics method
胡开业 1石林飞 1周辉 1毛丽君1
作者信息
- 1. 哈尔滨工程大学 船舶工程学院,黑龙江 哈尔滨 150001
- 折叠
摘要
针对水陆两栖飞机加速起飞运动过程受波浪干扰问题,本文基于Star-CCM+平台数值模拟技术,引入SST k-ε湍流模型求解RANS方程,VOF方法捕捉自由液面,DFBI模块以及重叠网格技术模拟水上飞机六自由度运动,建立了一套波浪中水陆两栖飞机加速滑行起飞运动特性研究方案.以波长和波高为变量,探讨了加速滑行过程中上述变量对水上飞机升沉、纵摇运动响应以及机身重心处垂向加速度的影响规律.结果表明:随着波长增加,飞机升沉运动先增加后缓慢变化,飞机重心垂向加速度、纵摇角加速度和纵摇峰值集中在波长为 2～3 倍机身长度海况范围内;随着波高增大,飞机升沉、纵摇运动及重心垂向加速度最大值随之增大,且长波中的运动变化量较短波中更大;机翼气动升力数值模拟结果与计算值一致,该方案可用于水陆两栖飞机气动力相关计算.
Abstract
To address the problem of an amphibious aircraft being disturbed by waves during an accelerated take-off motion,based on the numerical simulation technology of the Star-CCM+ platform,we introduce SST k-ε turbulence model to solve the RANS equation.We use the VOF method to capture the free surface and apply the DFBI module and overset grid technology to simulate the six-degree-of-freedom motion of a seaplane,thereby establishing a set of research schemes on the characteristics of accelerated taxiing and the take-off movement of an amphibious aircraft in regular waves.Considering wavelength and wave height as variables,we discuss their influence on variables on the heave-and-pitch motion response of the seaplane and the vertical acceleration at the center of gravity of the fuselage during acceleration taxiing.The results show that as the wavelength increases,the heave motion of the aircraft first increases and then changes slowly.The vertical acceleration of the aircraft's center of gravity,pitch angular accel-eration,and pitch peaks are concentrated within the range of the sea state such that the wavelength is 2-3 times the fuselage length.With an increase in the wave height,the maximum value of the aircraft heave,pitch motion,and the vertical acceleration of the center of gravity will increase,and the motion change in the long waves is greater than that in the short waves.The aerodynamic lift of the wing obtained through numerical simulation is consistent with the calculated value.This solution can be used for the correlation calculation of the aerodynamic force of am-phibious aircraft.
关键词
水陆两栖飞机/纵向稳性/加速运动/计算流体力学/纵摇/升沉/规则波/重叠网格Key words
amphibious aircraft/longitudinal stability/accelerated motion/computational fluid dynamics/pitch/heave/regular wave/overset grid引用本文复制引用
基金项目
工业和信息化部民机专项(MJ-2017-F-03)
出版年
2024
国家科技期刊平台
NSTL
万方数据