基于碳氢燃料裂解工作的ATR发动机性能分析

提出了一种基于碳氢燃料裂解气体驱动涡轮工作的ATR发动机方案,并对特定裂解气成分的碳氢ATR发动机性能进行计算,获得了裂解气中烷/烯比对发动机性能的影响规律。结果表明,在同一飞行条件下,随着发动机转速上升,推力逐渐上升,比冲基本呈减小趋势;在同一转速下,碳氢燃料裂解气中烷/烯比越大,发动机比冲越高。在烷/烯比4、转速百分比70%条件下,发动机比冲最高达到约7 644 m/s;随着烷/烯比逐渐升高,裂解气比热容逐渐升高。

Performance analysis of ATR engine working with cracking gas of hydrocarbon fuel

A new scheme about ATR (air turbo rocket) engine driven by cracking gas of hydrocarbon fuel is presented in this paper. The performance of ATR engine working with specific cracking gas components is calculated. The influence law of alkane/alkene ratio from cracking gas on engine performance was obtained. The results show that the thrust increases and the specific impulse has a degressive trend basically as the rotating speed of the engine increases under the same flight condition, and the higher the alkane/alkene ratio of cracking gas rises, the higher the specific impulse becomes at the same rotating speed. The specific impulse of the engine can reach about 7644 m/s while alkane/alkene ratio is 4 and its rotating speed is 70%. The specific heat capacity of cracking gas increases gradually with the rise of alkane/alkene ratio.