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Computational Study of NASA's Quadrotor Urban Air Taxi Concept

机译：NASA四旋翼城市空中出租车概念的计算研究

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High-fidelity computational fluid dynamics simulations have been carried out in order to analyze NASA's quadrotor urban air taxi concept for urban air mobility, also know as on-demand mobility applications. High-order accurate schemes, dual-time stepping, and the delayed detached-eddy simulation model have been employed. The flow solver has been loosely coupled with a rotorcraft comprehensive analysis code. The vehicle simulated is a six-passenger quadrotor for air taxi operations. A study of power reduction as a function of the rear-rotor to front-rotors vertical separation has been performed, for a quad-rotor without the airframe, in cruise flight conditions. Then, the quadrotor without the airframe has been simulated in hover. The airloads and wake geometries are analyzed. To finish the study the complete quadrotor vehicle is presented. NASA's quadrotor air taxi concept is one of the many concepts being developed by NASA in support of aircraft development for vertical take-off and landing air taxi operations.
机译：为了分析NASA的四旋翼城市空中出租车概念以实现城市空中机动性（也称为按需机动性应用），已经进行了高保真计算流体动力学仿真。高阶精确方案，双重时间步进和延迟的分离涡模拟已被采用。流量求解器已与旋翼航空器的全面分析代码松散地结合在一起。模拟的车辆是用于空中滑行操作的六座四旋翼飞行器。对于在巡航飞行条件下没有机身的四旋翼，已经进行了功率降低的研究，该功率降低是后旋翼与前旋翼垂直分离的函数。然后，在悬停状态下模拟了没有机身的四旋翼飞机。分析了空气载荷和尾流几何形状。为了完成研究，提出了完整的四旋翼飞行器。 NASA的四旋翼空中滑行概念是NASA为支持垂直起飞和着陆空中滑行操作的飞机开发而开发的众多概念之一。

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