Ideal thermodynamic cycle analysis of gas turbine based on detonation combustion

In view of self-pressurized, high flame propagation speed and other characteristics of detonation combustion, it was proposed that the constant pressure combustor of gas turbine was replaced by the detonation combustor, and the ideal thermodynamic cycle model of gas turbine based on detonation combustion was established; then the performances of DCGT(Detonation Cycle of Gas Turbine), Brayton and Humphrey thermodynamic cycle were comparatively analyzed. On condition that the parameters of combustor inlet, the fuel and the turbine backpressure are the same, the results show that the performance of DCGT is, compared with the other two, better. When the compressor pressure ratio is 16, the cycle thermal efficiency of detonation gas turbine is increased by 15.4% compared with Brayton cycle and the fuel consumption rate is decreased by 13.5%. The performance of DCGT at pressure ratio 6.6 is equivalent to that of Brayton cycle gas turbine at pressure ratio 16.