某型航空发动机起动故障试验

为解决某型航空发动机冷热态起动不兼容问题，基于发动机室内试车台，对起动过程进行研究，分析了起动故障原因。研究了起动机功率、起动机脱开转速及起动供油逻辑对起动性能的影响，通过多种调整措施，对起动过程进行了优化，并试验验证了措施的有效性。结果表明:起动机功率提高10%，起动时间缩短5%；起动机脱开转速提高2%，起动时间缩短18%～25%；调整优化起动供油逻辑，增加起动前中期供油量，减少后期供油量，可有效改善发动机的起动性能。 

Test on starting failure for an aero-engine

To solve the incompatibility problem of cold and hot starting for an aeroengine, based on the aero-engine test bed, the ground start of aero-engine was analyzed and the reasons were found. The effects of starter power, starter disengagement speed and starting fuel supply logic on starting performance were studied. Some methods were proposed to improve aero-engine start ability and through the test, correctness of the methods was verified.Test results indicated that the starter power increased by 10% and start time reduced by 5%；the starter disengagement speed was increased by 2% and the starting time was shortened by 18%-25%; if some steps were taken to adjust and optimize the starting fuel supply logic, increased the fuel supply before the start, and reduced the amount of fuel supply in the later period, the starting performance of the engine could be effectively improved.