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首页> 外文期刊>International journal of aerospace engineering >Design and Analysis of Propeller for High-Altitude Search and Rescue Unmanned Aerial Vehicle
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Design and Analysis of Propeller for High-Altitude Search and Rescue Unmanned Aerial Vehicle

机译：高空搜索螺旋桨的设计与分析，救援无人机

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The commercially available unmanned aerial vehicles are not good enough for search and rescue flight at high altitudes. This is because as the altitude increases, the density of air decreases which affects the thrust generation of the UAV. The objective of this research work is to design thrust optimized blade for an altitude range of 3,000–5,000?m with a density of air 0.7364?kg/m 3 , respectively, and perform thrust analysis. The property of aluminum alloy 1,060 being lightweight is chosen for designing and testing of blade. The blade element theory-based design and analysis code was developed, and user-friendly aerodynamic inputs were used to obtain the desired outputs. The geometry designed for an altitude range of 3,000-5,000?m faced the total stress of 6.0?MPa which was at 70% of the blade span. This stress is within the limit of yield strength of the aluminum alloy, 28?MPa. The modal analysis shows the first natural frequency occurs at around 12,000 RPM which is safe for operating the blade at 0-5,000 RPM. Experimental analysis of the blade gave a thrust of 0.92?N at 2,697 RPM at 1,400?m. The analytical solution for thrust with the same conditions was 1.7?N with 85.6% efficiency. The validation of experimental results has been done by the CFD analysis. The CFD analysis was performed in ANSYS CFX which gave a thrust value of 2.27?N for the same boundary conditions. Thus, the blade designed for high altitude SAR UAV is structurally safe to operate in 0-5,000 RPM range, and its use in search missions could save many lives in the Himalayas.
机译：市售无人驾驶飞行器不够好，以便在高海拔地区搜索和抢救飞行。这是因为随着高度增加，空气密度减小，影响了无人机的推力生成。该研究的目的是设计推力优化刀片，用于3,000-5,000×m的高度范围，分别为0.7364 kg / m 3的密度，并进行推力分析。选择铝合金1,060的特性，用于设计和测试刀片。开发了基于刀片元素理论的设计和分析代码，并且使用用户友好的空气动力学输入来获得所需的输出。设计为3,000-5,000？M的高度范围设计的几何形状面向6.0的总应力为6.0？MPA，距叶片跨度的70％。这种应力在铝合金的屈服强度的极限范围内，28℃。模态分析表明，第一种自然频率发生在约12,000 rpm约为12,000 rpm，这对于在0-5,000rpm下操作刀片。叶片的实验分析在1,400℃下以2,697rpm为0.92Ω·n的推力。具有相同条件的推力的分析溶液为1.7Ω·效率为1.7Ω·效率为85.6％。 CFD分析已经完成了实验结果的验证。在ANSYS CFX中进行CFD分析，其在相同的边界条件下给出了2.27Ω·n的推力值。因此，为高海拔SAR无人机设计的刀片在结构上是安全的，以在0-5,000 rpm范围内运行，并且其在搜索任务中的使用可以挽救在喜马拉雅山的许多生命。

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