1. 中国空气动力研究与发展中心 跨介质飞行器研究中心,绵阳,621000
2. 中国空气动力研究与发展中心 空天技术研究所,绵阳,621000
3. 中国空气动力研究与发展中心,绵阳,621000
白兴之(1995—),男,四川绵阳人,博士研究生,研究方向:跨介质流体动力学. E-mail:49470807@qq.com
吴文华*(1975—),研究员,研究方向:跨介质流体动力学. E-mail:619677947@qq.com
纸质出版:2024
移动端阅览
白兴之, 吴文华, 林泽铖, 等. 旋翼近水面效应影响因素[J]. 空气动力学学报, 2024, 42(1): 86−99.
BAI Xingzhi, WU Wenhua, LIN Zecheng, et al. The influence factors of near water effect of rotor[J]. 2024, 42(1): 86-99.
白兴之, 吴文华, 林泽铖, 等. 旋翼近水面效应影响因素[J]. 空气动力学学报, 2024, 42(1): 86−99. DOI: 10.7638/kqdlxxb-2023.0108
BAI Xingzhi, WU Wenhua, LIN Zecheng, et al. The influence factors of near water effect of rotor[J]. 2024, 42(1): 86-99. DOI: 10.7638/kqdlxxb-2023.0108.
旋翼在近水面高速旋转产生的水气交混流场会引发近水面效应,为了解近水面效应对飞行器介质跨越造成的潜在风险,通过近水面与地面实验详细对比了不同直径的碳纤维旋翼桨叶在无地效、地面效应与近水面效应工况下的气动特性。研究分析了旋翼近水面效应关键影响因素,指出了旋翼在近水面工作时拉力、扭矩与功率剧烈变化的原因,初步认识了液滴对于旋翼的作用,揭示了近水面效应影响规律:对于直径0.56 m桨叶,在高油门、低水面距离工况下,近水面效应具有非线性增升、增阻、转速降低、需用功率增大的效果;低油门、高水面距离工况下具有增升、减阻的效果;同时近水面效应又受旋翼直径、桨叶类型、转速影响。对于直径0.25 m桨叶,在不同工况下近水面效应都具有增升、减阻的效果。
Cross-media vehicles
or hybrid aerial underwater vehicles (HAUV) are capable of operating in air and water and performing continuous and uninterrupted high-quality observation and sampling. However
the mixed air-water flows generated by the rotor near the water surface always resulting the near water effect. To understand the potential risks caused by the near water effect in the cross-media process
near water and ground tests were conducted to obtain the aerodynamic characteristics of carbon fiber rotor blades with different diameters under the conditions of out of ground effect
ground effect and near water effect. The study identified the key factors influencing the near water effect
and explained the significant changes in thrust
torque
power
and other factors when the rotor operates close to the water surface. The study also revealed the physics of near water effect
including the impact of droplets on the blades. For blades with a diameter of 0.56 m
when operating at high throttle and low distance off the water surface
the near water effect leads to a nonlinear increase in thrust
torque
required power
and a decrease in rotor speed. Under low throttle and high distance conditions
the near water effect is similar to the ground effect
resulting in increased thrust and reduced torque; additionally
the rotor size
blade type
and rotor speed have significant consequences on the near water effect. For blades with a diameter of 0.25 m
the near water effect leads to a increase in thrust and decrease in torque. It is evident that comprehending the near water effect of the rotor is advantageous for the layout design and dynamic modeling of cross-media vehicles.
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