基于分形理论的航空发动机推力性能衰退规律

Investigation of aero-engine thrust performance deterioration rules based on fractal theory

考虑到航空发动机本身及影响因素的复杂性,从研究复杂系统的角度出发建立了基于De Wijs分形理论的航空发动机推力衰退模型,在此基础上对航空发动机的推力性能衰退规律进行了分析和研究.研究发现航空发动机使用过程中全加力状态推力的衰变具有生物体寿命衰退特征,并在一定程度上可用维数为0.761的De Wijs分形曲线近似.

Considering the complexity of aero-engine and influential factors,a deterioration model for engine thrust degradation was established with De Wijs fractal theory from the perspective of complex system.Aero-engine thrust deterioration rules was analyzed and investigated based on this model.It＇s found that the thrust deterioration in full afterburning condition is characterized by aging of organism,and can be modeled by the De Wijs fractal curve with fractal dimension of 0.761 to some extent.