航空发动机吸鸟适航验证关键参数分析方法
Analysis Method of Critical Parameters on Aircraft Engines Bird Ingestion Airworthiness Certification

发展了一种确定航空发动机风扇叶片吸鸟适航验证用关键参数的分析方法。首先分析关键参数，提出用综合关键撞击参数SCIP评估鸟撞击叶片损伤效果及确定试验用关键吸鸟参数CIP的方法，建立SPH法鸟撞旋转风扇叶片有限元模型，进行鸟撞击数值模拟，分析鸟速、风扇转速、撞击位置等参数对鸟撞击数值模拟结果的影响，得出各个状态下综合损伤参数。结果表明，在CIP=F（72 m/s，70%，100%）试验条件下，鸟撞击叶片的综合损伤最为严重，并据此确定一组吸鸟适航验证用关键吸鸟参数。
An analysis method of key parameters on aircraft engines bird ingestion Airworthiness certification was suggested. Based on the critical parameters analysis, the synthesized key impact parameter (SCIP) method was presented to estimate bird-impact damage and determine certification critical ingestion parameters (CIP). Meanwhile, the finite element model for bird impact on rotating fan blades was established by using SPH method, and the numerical simulations of the bird-impact were carried out. The influences of parameters such as bird ingestion speed, rotating speed of fan, impact location were studied, and the SCIP values under different conditions were obtained. It is concluded that the bird-impact damage is the most serious on the condition of CIP=F(72 m/s,70%,100%). Consequently, a set of CIP for bird ingestion airworthiness certification test was confirmed