Papers by Author: Lei Zhu

Abstract: Due to compressor fouling, gas turbine efficiency decreases over time, resulting in decreased power output of the plant. To counteract the effects of compressor fouling, compressor on-line and off-line washing procedures are used. The present research is aimed to propose a method of mathematical modeling of offline washing interval which will be estimated as the RUL of compressor based on Proportional hazards model. Application of the proposed prediction method to the case of Civil Aero-engine proved its effectiveness.

Abstract: The concept of delay time and its maintenance theory are introduced, considering failure modes of system have different probability of occurrence and repair time, two revised model are established with the defects follow homogeneous processes and non-homogeneous process, The revised model could improve the expected unit downtime and optimize inspection interval.