指尖密封型线主动控制优化设计研究

Engineering Optimization Design of Shape-Curve of Finger-Seal of Aero-Engine

根据密封装置工作性能的需求,提出了以寻求合理性能匹配的指尖密封结构为目标的主动控制优化方法。通过构建主动控制优化数学模型和建立密封装置的实际工程参数与优化模型中诸多参数的关系,建立了指尖密封型线主动控制优化设计方法。借助于计算实例实现了获得符合工程实际性能要求的指尖密封型线结构的整个优化过程,有限元数值分析支持了计算实例的结果,从而表明了文中提出的指尖密封型线主动控制优化方法的合理性。

Since 2000, we have been among the first in China to pay attention to the increasing importance of shape-curve of finger seal of aero-engine. We have written several published papers reporting our progress. This is the newest of our progress reports. To report our newest findings in detail is very difficult. Instead of dwelling on the details, we just describe our line of thinking. Existing papers on this important problem appear to emphasize some respects and neglect other respects. We present an active control optimization method that considers all the known respects in an engineering way, so as to keep the needed algorithm within manageable limits. The requirements on hysteresis and stiffness of finger-seal are contradictory. In aero-engine, however, these two requirements on finger seal vary from one locality of finger seal to another. Our algorithm takes into consideration these variations and can give an optimization design that accord with the real situation existing in aero-engine. We give a numerical example, whose results show that our active control optimization method is feasible and reasonable.