TV3-117 turboshaft engine

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The TV3-117 turboshaft (Figure 1) with a maximum power of 1640 kW and overall pressure ratio of 9.4 belongs to one of the world’s most popular helicopter Mi8 engines. It rotates anticlockwise (looking from aft to fore) and has a 12-stage axial compressor with a subsonic inlet and variable inlet guide vanes. Close to the blade tip, the Mach number is M = 0.8–0.92. The tip radius is 163 mm. The number of blades in subsequent stages are as follows: 37, 43, 59, 67, 73, 81, and 89 in further stages. This work aims to analyze and predict the erosive wear of the TV3-117 engines powering theMi-8MTV and Mi-24 helicopters the desert environment with high concentration of dust, and sand dispersing up to a height of 6000 m, which is the helicopter operation zone. The size of particles ingested into the gas path ranges from 0.01 to 2 mm.