大载荷植保无人直升机近地飞行流场模拟
发布时间：2018-10-25 08:35
【摘要】：为了研究大载荷植保无人直升机近地飞行时下洗流场的特征,建立了FR-200植保无人机三维实体模型,并对计算区域进行网格划分,采用SST k-ω湍流模型计算了大载荷植保无人直升机近地飞行流场.结果表明:大载荷植保无人直升机近地飞行时下洗流场由于受到机身阻挡的作用,在机身正下方位置处速度分布较为紊乱;下洗流场的主要运动形式为垂直向下运动,旋翼正下方沿旋翼方向速度先增大后减小,在y/R=0.8附近速度到达最大;植株冠层处风场随着飞行高度的降低,风场宽度增加,获得较佳的飞行高度为H=4 m;大载荷植保无人直升机喷杆垂直方向安装在z=-1.50 m至z=-2.00 m之间,飞行方向安装在x=-0.50 m至x=0.50 m之间.
[Abstract]:In order to study the characteristics of wash flow field in the near ground flight of large payload plant protection unmanned helicopter, a 3D solid model of FR-200 plant protection UAV is established, and the computational area is meshed. The SST k- 蠅 turbulence model is used to calculate the near ground flow field of a large load plant protection unmanned helicopter. The results show that the velocity distribution of the downwash flow field is disordered at the position directly below the fuselage due to the blockage of the fuselage, and the main motion form of the downwash flow field is vertical downward motion. The velocity of the rotor increased first and then decreased along the rotor direction, and reached the maximum near y/R=0.8, and the wind field width increased with the decrease of the height of the plant canopy. The optimum flying altitude is H4 m, the vertical direction of the spray rod is between 1.50 m and 2.00 m, and the direction of flight is between 0.50 m and 0.50 m for the heavy load plant protection unmanned helicopter.
【作者单位】： 江苏大学能源与动力工程学院;
【基金】：江苏省农业科技自主创新资金资助项目(CX(15)1038)
【分类号】：S251
本文编号：2293177
[Abstract]:In order to study the characteristics of wash flow field in the near ground flight of large payload plant protection unmanned helicopter, a 3D solid model of FR-200 plant protection UAV is established, and the computational area is meshed. The SST k- 蠅 turbulence model is used to calculate the near ground flow field of a large load plant protection unmanned helicopter. The results show that the velocity distribution of the downwash flow field is disordered at the position directly below the fuselage due to the blockage of the fuselage, and the main motion form of the downwash flow field is vertical downward motion. The velocity of the rotor increased first and then decreased along the rotor direction, and reached the maximum near y/R=0.8, and the wind field width increased with the decrease of the height of the plant canopy. The optimum flying altitude is H4 m, the vertical direction of the spray rod is between 1.50 m and 2.00 m, and the direction of flight is between 0.50 m and 0.50 m for the heavy load plant protection unmanned helicopter.
【作者单位】： 江苏大学能源与动力工程学院;
【基金】：江苏省农业科技自主创新资金资助项目(CX(15)1038)
【分类号】：S251
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