Thermodynamic cycle performance of detonation gas turbine with variable specific heat capacity

In order to analyze the thermodynamic cycle performance of detonation gas turbine with variable specific heat capacity, the thermodynamic cycle model of detonation gas turbine was established by considering the specific heat capacity varying with the composition and temperature of the working fluid, as well as the efficiency of the compressor, combustor, turbine and other components. Under different comparison conditions, the thermodynamic cycle performances of detonation cycle of gas turbine (DCGT), Brayton cycle and Humphrey cycle gas turbine were analyzed by using variable specific heat capacity method. The results show that the performance of DCGT is better than that of Brayton cycle. When the turbine inlet temperature is 1 620 K and the pressure ratio is 16.5, the thermal efficiency of DCGT is increased by 28.8% compared with Brayton cycle. When the dimensionless absorbed heat is 4.25 and the pressure ratio is 16.5, the thermal efficiency of DCGT is 30.7% higher than Brayton cycle.