Simulation Study on Aerodynamic Characteristics of Multi-Body Separation of Sub-Mother UAV
LI Yunlong
XU Xiaoping
ZHOU Zhou
BAI Yu
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.
Keywords：UAVaerodynamic interferencemulti-body separationcomputational fluid dynamicsoverset mesh methodsix-degree-of-freedom motion equation
Publication Date：2024-08-25
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 79-85,93 )