仿生扑翼UUV流体动力数值计算

摘要

仿生扑翼推进方式具有机动灵活、推进噪声低、稳定性好等特点,但由于外形的复杂性,仿生扑翼UUV的流体动力具有很强的非线性,给流体动力特性的研究带来难度.为了研究仿生扑翼的非线性流体动力特性,基于雷诺平均Navier-Stokes方程,采用RNG k-ε模型,建立了仿生扑翼UUV的流体动力计算数学模型,并利用ICEM CFD划分了网格,基于标准CFD软件Fluent对UUV的流体动力特性进行了仿真计算.结果表明,仿生扑翼UUV的流体动力在小攻角下呈线性变化,大攻角下出现非线性特征.%The bionic flapping wing has some advantages, such as agile maneuverability, low noise and high stability. But the hydrodynamics characteristic of the bionic flapping wing unmanned underwater vehicle (UUV) is nonlinear because of the complicated shape, so the research the hydrodynamics characteristic of the bionic flapping wing UUV is difficult. In this paper, to study the hydrodynamics characteristic of the bionic flapping wing UUV, the hydrodynamics calculation model was built based on the Reynolds average Navier-Stokes equation. And the meshes were divided by ICEM CFD. Than the hydrodynamics of the flapping wing UUV was simulated by Fluent. The results show that the hydrodynamics of the UUV shows linear characteristic when the angle of attack is small, but nonlinear characteristic when the angle of attack is big.