子母无人机多体分离气动特性模拟
Simulation Study on Aerodynamic Characteristics of Multi-Body Separation of Sub-Mother UAV
李云龙 1许晓平 1周洲 1拜昱1
作者信息
- 1. 西北工业大学航空学院,西安,710072
- 折叠
摘要
子母机多体分离过程中气动干扰特性的分析是集群无人机发射技术的重要研究方向.基于动态嵌套非结构多面体网格技术,耦合求解流场非定常N-S方程与刚体六自由度运动方程,实现了子母机多体分离过程的精确模拟.首先,对母机的气动干扰区和子母机的分离方式进行分析,其次,计算得到整体状态时子母机以及子机与子机之间的气动干扰特性,最后,根据多体分离过程中子机运动状态的变化情况,进行安全特性评估.研究结果表明:相对于减速分离,加速分离能够快速脱离气动干扰区,安全性更高,并且随着子机数量的增加,子机机翼的距离不断减小,在一定程度上减弱了子机的翼尖涡对翼面的影响,增大了子机的升力.
Abstract
In the process of multi-body separation of sub-mother UAV,the analysis of aerodynamic inter-ference characteristics is an important research direction in swarm UAV launch technology.In this paper,based on the dynamic nested unstructured polyhedral mesh technology,the unsteady N-S equation of the flow field and the six-degree-of-freedom motion equation of the rigid body are coupled to realize the accu-rate simulation of the multi-body separation process of the sub-mother UAV.Firstly,the aerodynamic in-terference zone of the parent UAV and the separation mode of the child UAV are analyzed.Secondly,the aerodynamic interference characteristics of the sub-mother UAV and between the sub-UAV and the sub-UAV and the sub-UAV in the overall state are calculated.Finally,according to the change of the motion state of the sub-UAV in the process of multi-body separation,the safety characteristics were evaluated.The results show that compared with deceleration separation,accelerated separation can get out of the aer-odynamic interference region faster and has higher safety.Moreover,with the increase of the number of sub-UAVs,the distance of the wings of the sub-UAV decreases continuously,and this also weakens the influence of the wingtip vortex on the wing surface of the sub-UAV to a certain extent and increases the lift of the sub-UAV.
关键词
无人机/气动干扰/多体分离/计算流体力学/嵌套网格技术/六自由度方程Key words
UAV/aerodynamic interference/multi-body separation/computational fluid dynamics/overset mesh method/six-degree-of-freedom motion equation引用本文复制引用
基金项目
陕西省重点研发计划(2023-YBGY-373)
陕西省自然科学基础研究计划(2023-JC-YB-010)
陕西省自然科学基础研究计划(2023-JC-QN-0043)
出版年
2024
国家科技期刊平台
NSTL
万方数据