摘要
航空发动机气路静电传感器的结构参数直接影响着传感器的性能。采用有限元的方法,分析了传感器的结构参数对静电传感器特性的影响规律。分析结果表明:增加传感器的感应探极,传感器的灵敏度有所提高,灵敏度分布空间也增大;随着绝缘材料的介电常数增加,灵敏度值有所增加;而绝缘材料厚度的增加将会导致灵敏度下降,且随着轴向位置增加,绝缘层厚度对灵敏度值的影响逐渐减小。对于给定结构参数的传感器,采用数据拟合的方法,获得传感器的灵敏度分布函数,基于拟合系数的变化特点来确定传感器的安装布局;最后通过模拟实验对本文的方法进行了有效性验证。
The structural parameters directly influence the characteristics of an electrostatic sensor for aero-engines＇ gas path condition monitoring. In this paper, the finite element method was employed to analyze the influence of structural parameters on the performance of an electrostatic sensor. The analytical results show that the sensitivity value and space increase with an incresing of the sensing electrode, and isolation permittvity, while decrese with the increasing thickness of the isolation medium and with an increasing in the axial position, the influence of the thickness of the isolation medium on the sensitivity value decrease. For a sensor with given structural parameters, the data fitting method was adopted to acquire the sensitivity distribution function ; the placement location of electro- static sensor was determined based on the characteristic of fitting coefficients varying with the axial position. Final- ly, the present method was verified by the simulation experiments.
出处
《机械科学与技术》
CSCD
北大核心
2013年第1期140-145,共6页
Mechanical Science and Technology for Aerospace Engineering
基金
国家自然科学基金项目(51105344)
航空科学基金项目(2102ZB55003)
国家自然科学基金与中国民航总局联合基金项目(60939003)
河南省科技厅攻关计划项目(112022104551)资助
关键词
航空发动机
静电传感器
有限元分析
气路状态监测
数据拟合
aero-engine
electrostatic sensor
finite element analysis
gas path condition monitoring
data fitting
