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A Viscous Vortex Particle Model for Rotor Wake and Interference Analysis

机译：转子尾流的粘性涡粒子模型及其干扰分析。

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摘要

This paper presents a viscous vortex particle model that was developed to address the challenging rotor wake and interference problems. The viscous vortex particle model is a state-of-the-art rotor wake modeling technology that can accurately solve for the complicated rotor wake variation and is well suited for aerodynamic interaction simulation in complex environments. The current model directly solves the velocity-vorticity form of the incompressible Navier-Stokes equation using a grid-free Lagrangian simulation, which overcomes the hurdle of artificial numerical dissipation inherent in most current Navier-Stokes CFD methods and provides a successful solution to the rotor vorticity transportation and interaction. This paper discusses the fundamental viscous vortex parlicle formulation, numerical algorithms, and the simulation results. The predicted rotor wake geometry and the induced velocity were investigated in hover, forward flight, in ground effect and shipboard environment including comparisons with available measured data. Excellent agreement was obtained. The model was also used to trim a full UH-60 rotorcraft in level flight and encouraging results were obtained.
机译：本文提出了一种粘性涡旋颗粒模型，该模型是为解决具有挑战性的转子尾流和干扰问题而开发的。粘性涡旋粒子模型是一种最新的转子尾流建模技术，可以准确地解决复杂的转子尾流变化，非常适合复杂环境中的气动相互作用仿真。当前模型使用无网格拉格朗日模拟直接解决了不可压缩的Navier-Stokes方程的速度涡度形式，这克服了当前大多数Navier-Stokes CFD方法固有的人工数值耗散的障碍，并为转子提供了成功的解决方案涡旋运输和相互作用。本文讨论了粘滞涡旋的基本公式，数值算法和仿真结果。在悬停，向前飞行，地面效应和舰船环境中研究了预测的转子尾流几何形状和感应速度，包括与可用测量数据的比较。获得了极好的协议。该模型还被用于在水平飞行中对完整的UH-60旋翼飞机进行修剪，并获得了令人鼓舞的结果。

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