Zhornyk O. Improving the efficiency of the subsonic inlet device of the power plant with a turbofan engine

In the work, a scientific and methodological apparatus was created to solve the problem of increasing the efficiency of input devices of turbofan engines by choosing rational values of geometric parameters and the shape of the input device. Scientifically based recommendations on the number of inlet racks of the annular inlet device for a turboprop engine have been developed. Scientifically based recommendations have been developed regarding the relative length of the power strut chord of the input device on the aerodynamic characteristics of the input device of the turboprop engine. The improved technique allows you to build a bucket inlet device of a power plant with a turboprop fan engine, ensuring the equivalence of air flow, compared to an annular inlet device. Scientifically based recommendations on the rational value of the curvature and narrowing of the S-shaped channel to ensure the increase in efficiency of the bucket inlet device have been obtained. The influence of the coaxial propeller on the efficiency of the bucket inlet device of the power plant with the turboprop engine was evaluated. It was established that the use of a bucket inlet device, instead of a ring inlet device, allows increasing the full pressure recovery factor by 5-7%.