对涡喷七发动机全加力状态温度高推力小的剖析和排故措施

 涡喷七发动机全加力状态温度高推力小问题,是长期没有解决的生产关键。文章从实际出发,进行理论计算和统计分析,从而找到产生故障的原因,其中有大气湿度的影响,发动机涡轮部件性能退化,~t4温度受大气温度的影响和~t4温度场的不均匀性。针对以上原因,提出了行之有效的排故措施,对解决我国当前使用的双转子发动机经常出现的温度高推力小问题有广泛的现实意义。

THE ANALYSIS AND SOLUTION OF THE PERFORMANCE DETERIORATION PROBLEM OF WP7 ENGINE UNDER THE FULL REHEATING CONDITION

The performance deterioration of WP7 engine, i.e, the turbine exit gas tempera-ture(t4) is higher or the thrust is lower than the specific value under full reheating condition is a key problem which has not solved for a long time. The causes of this kind of trouble are analysed by statistical data and theoretical calculation. They are found out that the ambient humidity, the performance degeneration of the turbine assembly, the ambient temperature and the nonuniformity of the field are the main factors that cause the performance deterioration. Some feasible measures are proposed to avoid or lessen this trouble.