Forecasting the optimal values of working process parameters of a sixth generation turbofan by means of numerical simulation

The article describes the results of forecasting of the optimal values of working process parameters of a sixth generation turbofan by means of numerical simulation. The problem statement: the optimal values of working process parameters of a separate-flow three-spool turbofan having the efficiency factors corresponding to the 6th generation turbofan engines and intended for use as a propulsion unit of a short-, medium- and long-range airplane are to be calculated on the basis of airplane flight cycle simulation. The optimization was performed using the computer-aided system “ASTRA” with a total weight of the propulsion unit and the required fuel selected as an optimization criterion. Numerical simulation of the airplane flight cycle was performed for each combination of the optimizable values. The results of optimization show that with an increase in the working process parameters, bypass ratio and flight range the regions of locally-optimal values are widening for a given value of criterion concession. The values of specific fuel consumption of the sixth generation turbofan engines intended for the subsonic passenger airplanes are predicted at the level of 42..45 kg per kN per hour.