临近空间升浮一体飞行器气动优化设计  

Aerodynamic design optimization of near-space buoyancy-lifting vehicle

作　　者：柳龙贵 牛会鹏 胡星志 江雄 韦广健 Liu Longgui;Niu Huipeng;Hu xingzhi;Jiang Xiong;Wei Guangjian(Beijing Aerohydrodynamic Research Center,Beijing 100011,China;Nanjing Tianfu Software Co.,Ltd,Nanjing 211100,China)

机构地区：[1]北京流体动力科学研究中心,北京100011 [2]南京天洑软件有限公司,南京211100

出　　处：《空天技术》2023年第5期33-40,共8页Aerospace Technology

摘　　要：临近空间飞行器近年来得到了广泛的关注和研究。为提高升浮一体飞行器抗风能力和驻空时间,对升浮一体飞行器气动外形优化进行研究。基于CAESES软件对升浮一体飞行器进行三维全参数化建模,可通过调节11个参数改变飞行器气动外形。建立了“设计→仿真→优化”自动化仿真流程,通过智能优化算法对升浮一体飞行器进行气动优化,优化目标函数综合考虑飞行器的升阻比和自身重量。通过计算流体力学方法对不同气动外形进行仿真,得到飞行器升阻比等气动特性。结果表明,优化后的升浮一体飞行器升阻比提高43%,减重16.6%。升浮一体飞行器阻力减小,有效载荷增大,总体性能得到明显提升。Near-space vehicles have received widespread attention and research in recent years.To improve the wind resistance and endurance of the buoyancy-lifting vehicle,research was conducted on the aerodynamic shape optimization of the buoyancy-lifting vehicle.Three-dimensional fully parameterized modeling of the buoyancy-lifting vehicle was conducted based on CAESES software.The aerodynamic configuration of the vehicle could be changed by adjusting 11 parameters.An automated simulation process of"design→simulation→optimization"had been established,which used intelligent optimization algorithms to optimize the aerodynamic performance of the buoyancy-lifing vehicle.The optimization objective function comprehensively considered the lift-to-drag ratio and self-weight of the vehicle.Computational fluid dynamics was used to simulate different aerodynamic configurations,and aerodynamic characteristics such as lift-to-drag ratio of the buoyancy-lifting vehicle was obtained.The result showed that lif-to-drag ratio of the optimized scheme was increased by 43%and the weight of the vehicle was reduced by 16.6%.The aerodynamic drag decreased and the effective load increased,resulting in a significant improvement in overall performance of the buoyancy-lifting vehicle.

关 键 词：临近空间 升浮一体 气动外形优化 CAESES 参数化建模 

分 类 号：V274[航空宇航科学与技术—飞行器设计]