Rotor blades play an important role in unmanned helicopters, and it is of great significance to study the erosion of rotor blades. In this study, titanium alloy (Ti-4Al-1.5Mn) was used as the helicopter rotor blades’ surface material. The commercial software Ansys-Fluent 18.0 was mainly used to study the erosion of solid particles on the helicopter rotor blades. The moving mesh method and the discrete phase method (DPM) were used to construct an erosion model of the blades at different speeds (500, 1000, or 2000 rpm), and at different particle mass flow rates (0.5, 1, or 1.5 kg/s). The results show that the erosion of helicopter blades is mainly observed at the leading edge and at the tip of the blades. At different particle mass flow rates, greater particle mass flow rates lead to greater DPM erosion rates. As the blade speed increases, the maximum DPM erosion rate decreases, but the severely eroded area increases. Finally, the values of the severely eroded area of the helicopter rotor blades and the ratios of the severely eroded area growth are obtained through the image processing method.

中文翻译：

---

旋翼的固体颗粒侵蚀区域：在小型无人直升机上的应用

旋翼桨叶在无人直升机中起着重要的作用，研究旋翼桨叶的腐蚀具有重要意义。在这项研究中，钛合金（Ti-4Al-1.5Mn）被用作直升机旋翼桨叶的表面材料。商业软件Ansys-Fluent 18.0主要用于研究直升机转子叶片上固体颗粒的腐蚀。使用移动网格方法和离散相方法（DPM）来构建叶片在不同速度（500、1000或2000 rpm）和不同颗粒质量流量（0.5、1或1.5 kg）下的腐蚀模型/ s）。结果表明，直升飞机叶片的腐蚀主要发生在叶片的前缘和尖端。在不同的颗粒质量流速下，更大的颗粒质量流速导致更大的DPM腐蚀速率。随着刀片速度的增加，最大DPM侵蚀率降低，但严重侵蚀的面积增加。最后，通过图像处理方法获得了直升机旋翼桨叶严重腐蚀面积的值和严重腐蚀面积增长的比率。