Abstract
In this study, titanium alloy (Ti-4Al-1.5Mn), magnesium alloy (Mg-Li9-A3-Zn3), or aluminum alloy (Al7075-T6) were used to construct the shell model of helicopter rotor blade to study the solid particle erosion of helicopter rotor blades. The erosion resistance of the three materials at different angles of attack (6°, 3°, or 0°) and particle collision speeds (70, 150, or 220 m/s) was examined using the finite volume method, the discrete phase method, and erosion models. In addition, the leading edge of the helicopter blades was coated with two types of bionic anti-erosion coating layers (V- and VC-type), in an attempt to improve erosion resistance at the angles of attack and particle collision speeds given above. The results showed that Ti-4Al-1.5Mn had the best erosion resistance at high speed, followed by Al7075-T6 and Mg-Li9-A3-Zn3. The angle of attack appeared to affect only the surface area of the blade erosion, while the erosion rate was not affected. Finally, the results of this article showed that the V-type bionic coating had better erosion resistance than the VC-type coating at the same impact speeds. The angle of attack did not have a significant effect on the erosion rate of the bionic coating.
Highlights
Solid particle erosion (SPE) generally refers to erosion and wear on a material surface caused by particle flow or dust at a certain speed and scale
The following models were used to test the SPE of helicopter rotor blades in which the outer skin of the helicopter blades was constructed from titanium alloy (Ti-4Al-1.5Mn), magnesium alloy (Mg-Li9-A3-Zn3,) and aluminum alloy (Al7075-T6)
The material of the blade impact speeds on different material blades, we look for the best erosion resistant material
Summary
Solid particle erosion (SPE) generally refers to erosion and wear on a material surface caused by particle flow or dust at a certain speed and scale. Shin et al carried out a numerical analysis using Fluent software (Ansys Inc., Canonsburg, PA, USA) of SPE on the blade surfaces of a helicopter main rotor rotating at high rotation speed in a dense, solid particle airflow at low altitude [4]. The following models were used to test the SPE of helicopter rotor blades in which the outer skin of the helicopter blades was constructed from titanium alloy (Ti-4Al-1.5Mn), magnesium alloy (Mg-Li9-A3-Zn3,) and aluminum alloy (Al7075-T6) In these models, the leading edge of the blade is fitted with a V- or VC-type bionic anti-erosion coating. The alloy materials, with and without bionic coatings, were tested for erosion resistance with respect to changes in the particle speed and angle of attack, in an attempt to optimize the anti-erosion properties of helicopter rotor blades
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