关于管道同轴旋转机无人机悬空性能的实验调查
Hai Li1,2, Zaibin Chen1,2, Hongguang Jia1,3
1Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China.
Sensors (Basel, Switzerland)
|July 29, 2023
概括
这项研究研究了小型无人飞行器 (SUAV) 的通道同轴转子系统. 确定了最佳配置,以提高推力,稳定性和推进效率,这对于SUAV空气动力学性能至关重要.
科学领域:
- 航空航天工程 航空航天工程
- 流体动力学 流体动力学
- 旋翼飞机 旋翼飞机
背景情况:
- 小型无人机 (SUAV) 需要高效的空气动力学设计.
- 管道式转子系统比开放式转子提供了潜在的性能优势.
- 了解设计参数对同轴旋转器系统的影响对于SUAV开发至关重要.
研究的目的:
- 通过实验研究通道同轴转子系统的空气动力学性能.
- 为了确定转子间距,尖端空隙和转子位置对悬浮性能的影响.
- 为了确定SUAV应用程序的最佳配置.
主要方法:
- 对各种配置的推力,扭矩和功率进行系统的实验测量.
- 分析单旋转机和同轴旋转机系统,管道式和无管道式.
- 设计参数的评估,包括转子间距 (H/R比),尖端空隙 (δ) 和转子位置 (P5).
主要成果:
- 对于同轴旋转机,确定了0.40的最佳H/R比,提高了推力和稳定性.
- 尖端空隙显著影响道单旋转推力;较小的间隙 (δ≤0.015R) 是有利的.
- 带有S1间距的管道同轴转子实现了最佳推进效率 (功率值为0.61),尽管由于泄漏损失增加了间距降低性能.
结论:
- 带有S1间距的通道同轴转子系统展示了优越的悬空性能和SUAV的推进效率.
- 转子间距影响推力分布,但不影响同轴系统中的推进效率.
- 尖端空隙是道式单旋转器推力增强的主要因素,最佳的旋转器定位可以显著改善功率负载.
相关概念视频
01:24Absolute Motion Analysis- General Plane Motion
240
Visualize a drone, with its propellers spinning rapidly, hovering mid-air. The fascinating movements and operations of this drone can be comprehended by applying the principle of general plane motion.
As the drone's propellers rotate, an upward force is generated that counteracts the force of gravity, enabling the drone to lift off from the ground. This initial movement of the drone is along a straight path, representing a form of translational motion. In this phase, every point on the...
As the drone's propellers rotate, an upward force is generated that counteracts the force of gravity, enabling the drone to lift off from the ground. This initial movement of the drone is along a straight path, representing a form of translational motion. In this phase, every point on the...
240
01:23Lift
189
Lift is a fundamental aerodynamic force that acts perpendicular to the direction of airflow. It plays a central role in achieving and sustaining flight and in stabilizing various vehicles. Lift primarily originates from pressure differences created across surfaces, such as an airfoil. A lower pressure region forms above the wing, while a higher pressure region forms below it, generating an upward force. This differential results from the shape and orientation of the airfoil, enabling the wing...
189
01:11Buoyancy and Stability for Submerged and Floating Bodies
1.9K
In fluid mechanics, buoyancy and stability are key concepts for understanding the behavior of submerged and floating bodies. When a stationary body is fully or partially submerged in a fluid, the fluid exerts a force on the body known as the buoyant force. This force acts vertically upward through a point called the center of buoyancy, which is the center of the displaced fluid volume. According to Archimedes' principle, the magnitude of the buoyant force is equal to the weight of the fluid...
1.9K
01:04Hydrostatic Pressure Force on a Plane Surface
380
When a plane surface is submerged in a fluid, hydrostatic forces develop on the surface due to the fluid's pressure. For horizontal surfaces, the pressure exerted by the fluid is uniform because the depth remains constant. The resultant force is determined by the pressure at the given depth multiplied by the area of the surface, and it acts through the centroid of the surface. For vertical surfaces, the pressure varies with depth, increasing as the distance from the fluid's free surface...
380
01:11Velocity and Acceleration in Steady and Unsteady Flow
132
In fluid mechanics, velocity and acceleration are key concepts for analyzing particle motion in both steady and unsteady flow. Consider a fluid particle moving along a pathline, where its velocity depends on its position and time. The particle's acceleration is obtained by differentiating the velocity with respect to time.
The acceleration can be generalized to any point in the flow, and expressed as components along three perpendicular directions, representing changes in velocity over...
The acceleration can be generalized to any point in the flow, and expressed as components along three perpendicular directions, representing changes in velocity over...
132