航空发动机吸入颗粒物静电感应特性的模拟实验及分析

利用静电传感器和SC-010型环境试验箱等硬件搭建了吸入颗粒物静电监测模拟实验平台,并在此实验平台上展开了针对航空发动机吸入颗粒物静电感应特性的模拟实验研究,成功获取相应静电监测信号。实验设置颗粒材料、管道流速、颗粒粒径和颗粒投入质量4种变量作为变量条件,分别进行4组单一变量的对比实验,采集在不同颗粒材料、不同管道流速、不同颗粒粒径以及不同颗粒质量浓度环境下带电颗粒所产生的静电感应信号,对每组实验信号的活动率水平(AL)、正/负事件率(PER/NER)和绝对平均幅值等特征参数进行相应的数据分析和对比,并得到了一些有用的结论。实验发现,上述4种变量条件分别对静电感应信号的绝对时域平均幅值、AL参数、PER/NER参数有不同程度的影响。

Electrostatic induction characteristics of aeroengine inhaled particles: simulated experiment and analysis

A simulated experiment platform designed for inhaled particles electrostatic monitoring is constructed, electrostatic sensors and SC-010 environmental chamber are used in the construction, simulated experiments on the characteristics of electrostatic induction of aeroengine inhaled particles are carried out by this platform, and the corresponding electrostatic signals are acquired successfully. Particle material, pipe flow velocity, particle size and particle mass concentration are set as experiment variables, and four groups of contrast experiments with different single variables are conducted in sequence. The electrostatic signals are acquired under different variable conditions, which included different particle materials, pipe flow velocities, particle sizes and particle mass concentrations; each kind of electrostatic signals and its activity level (AL), positive/negative event rate(PER/NER) and absolute average amplitude are analyzed and compared in this paper; some valuable conclusions are studied. The experiments found that four kinds of variable conditions mentioned above could have different effects on AL parameter, PER/NER parameter and absolute average amplitude.