基于爆震燃烧的燃气轮机理想热力循环分析

Ideal Thermodynamic Cycle Analysis of Gas Turbine Based on Detonation Combustion

鉴于爆震燃烧具有自增压、传播速度快等优点,提出了将燃气轮机中等压燃烧替换为爆震燃烧的理念,并建立了基于爆震燃烧的燃气轮机理想热力循环模型,对比研究了DCGT(detonation cycle of gas turbine)、Brayton和Humphrey 3种循环燃气轮机的综合性能。在压气机压比、吸热量和透平背压相同的条件下,数据分析结果表明DCGT循环燃气轮机较其他2种循环更具优势,在压比为16时其循环热效率较Brayton循环提高15.4%,燃料消耗率降低13.5%;DCGT循环燃气轮机在压比为6.6时的总体性能与压比为16时的Brayton循环相当。

In view of self-pressurized, high flame propagation speed and other characteristics of detonation combus- tion, 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 com- paratively 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 com- pressor 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 ra- tio 6. 6 is equivalent to that of Brayton cycle gas turbine at pressure ratio 16.