空气动力学学报2025，Vol.43Issue(12)：31-41,11.DOI:10.7638/kqdlxxb-2024.0137
跨介质飞行器旋翼近水面气动干扰机理建模与研究
Modeling and research of aerodynamic interference mechanisms for aerial-aquatic rotorcraft approaching the water surface
摘要
Abstract
Aerial-aquatic rotorcraft have garnered extensive attention due to their ability to operate in the air and underwater.However,their widespread application still faces challenges,the most prominent being the stable transition across water surfaces.Neglecting the near-water-surface effects during the transition process may lead to distortion in its system dynamics model,increase the difficulty of controller design,and even result in failure during the transitions.Most previous studies have relied on the ground effect theory to simulate the transition across water surfaces,but these efforts have shown limited accuracy in predicting rotor lift due to the significant differences between ground and water.In the present paper,we investigated the rotor's aerodynamics in proximity to the water surface using the potential flow theory,based on which a rotor aerodynamic model incorporating the near-water-surface interference is proposed and optimized by Laplace's law.Experiments conducted at various heights above the water surface and with different throttle settings have validated the superior predictive capability of the proposed model.The results indicate that the lift increases as the rotor approaches the water surface,but the increment is less significant than when it approaches the ground.Additionally,the lift increment induced by the near-water-surface effects diminishes at higher rotation speeds,manifesting as lift loss ratio ranging from approximately 5%to 44%.Finally,the aerodynamic model of the rotor and the correction method adopted in this study significantly improve the prediction accuracy of rotor lift under both near-ground and near-water-surface conditions.For small-and medium-sized rotors,the averaged prediction error is reduced by approximately 60%-80%.关键词
跨介质飞行器/旋翼/近水面效应/势流理论/地面效应Key words
aerial-aquatic vehicle/rotor/near-water-surface effect/potential flow theory/ground effect分类
航空航天引用本文复制引用
詹祺,徐尤松,王潇..跨介质飞行器旋翼近水面气动干扰机理建模与研究[J].空气动力学学报,2025,43(12):31-41,11.基金项目
跨域飞行交叉技术实验室资助项目(2024-KF03003,2024-KF03001) （2024-KF03003,2024-KF03001）
江苏省研究生科研与实践创新计划项目(KYCX24_0532) （KYCX24_0532）
