Енергетичний аналіз UH-60 для конфігурацій S0 ТА S2

This article presents an energy analysis of the UH-60 Black Hawk helicopter main rotor at a constant speed of 258 RPM for two blade configurations: the base (S₀) and modified (S₂) ones. Using calculated data and CFD modeling results, a comparison of the thrust (Cₜ), power (Cₚ), and integral efficiency (FM) coefficients is performed. It is found that when switching from S₀ to S₂, the power coefficient decreases by 39.5%, and the efficiency index increases by 60.4%, with virtually unchanged thrust. An analysis of the pressure and velocity distributions confirms a reduction in induced losses and equalization of the flow field behind the rotor. The results demonstrate that geometric optimization of the blade provides a significant increase in energy efficiency without increasing the speed and without losing the lifting capacity, which opens up prospects for further improvement of the rotor systems of medium-class helicopters.