氨解离度对无水肼ATR发动机性能影响研究  

Performance analysis of hydrazine ATR with different dissociated ratios of NH_3

作　　者：张留欢[1] 马化杰 周建平[1] 南向谊[1] 李光熙[1] ZHANG Liuhuan;MA Huajie;ZHOU Jianping;NAN Xiangyi;LI Guangxi(Xi'an Aerospace Propulsion Institute, Xi'an 710100, China)

机构地区：[1]西安航天动力研究所,陕西西安710100

出　　处：《火箭推进》2019年第2期16-19,52,共5页Journal of Rocket Propulsion

基　　金：装备预研航天科技联合基金(6141B060626040)

摘　　要：基于无水肼ATR发动机,开展了氨解离度对涡轮前燃气及发动机总体性能的影响研究,对不同氨解离度时无水肼ATR发动机性能进行计算对比。结果显示,随着氨解离度x升高,无水肼分解燃气温度降低,H_2、N_2在分解混合气中的质量百分比升高,燃气比热比、气体常数数值升高;在地面状态同一转速下,x越小,发动机比冲越高。在100%物理转速时,x=0.29对应的发动机比冲最高且为808 s,无水肼流量为0.999 kg/s,较x=0.8发动机比冲提高最大约7.3%,无水肼流量减小约7.33%;同一高空条件100%转速下,x越小,发动机比冲越高。在22 km/3.5Ma条件下,x=0.29较x=0.8发动机比冲提高最大约14.6%,无水肼流量减小约8.2%。在同一ATR发动机、同一转速下,氨解离度越低,涡轮等熵功越大,无水肼流量越小,发动机比冲越高。Based on hydrazine ATR, performance analysis of hydrazine ATR with different dissociated ratios of NH 3 ( x ) was presented here.And the calculation and comparison about performance of ATR with different x were carried out.The results show that as x increases, temperature of gas decreases which is dissociated from hydrazine by catalysis, mass percentage of H 2 , N 2 increases, and the value of specify heat ratio and gas constant goes up.On the ground state, the specify impulse of ATR increases as x decreases under the same rev.When the physical rev is 100% and x =0.29, the specify impulse reaches top 808s, which is 7.3% higher than that at x =0.8, and the mass flow rate of hydrazine is 0.999 kg/s, which is 7.33% lower than that at x =0.8.Under the condition of high altitude, the specify impulse of ATR increases as x decreases under the same rev.The specify impulse and mass flow rate, with x of 0.29, are 14.6% and 8.2% higher than that at x =0.8 when the flight condition is 22 km/3.5 Ma respectively.With the same ATR engine and rev, as the dissociated ratio of NH 3 decreases, isentropic work of turbine increases, mass flow rate of hydrazine decreases and specify impulse of ATR increases.

关 键 词：无水肼 ATR发动机 氨解离度 

分 类 号：V439[航空宇航科学与技术—航空宇航推进理论与工程]