Laser triangulation measurement of blade oscillation in a transonic compressor cascade

被引：0
作者：
Sidlof, Petr [1 ]
Sidlof, Pavel [1 ]
Stepan, Martin [1 ]
Simurda, David [2 ]
Lepicovsky, Jan [2 ]
机构：
[1] Tech Univ Liberec, NTI FM, Studentska 2, Liberec, Czech Republic
[2] Czech Acad Sci, Inst Thermomech, Dolejskova 5, Prague, Czech Republic
来源：
XXVI BIENNIAL SYMPOSIUM ON MEASURING TECHNIQUES IN TURBOMACHINERY, MTT2622 | 2023年 / 2511卷
关键词：
VIBRATION; FLUTTER;
D O I：
10.1088/1742-6596/2511/1/012010
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The paper describes a method for optical measurement of oscillation of blades in a linear cascade designed for flutter research. The method uses laser triangulation, which measures the distance between the sensor and the oscillation object. The distance can be recalculated to angular displacement of the blade. However, the relation is nonlinear due to the curvature of the blade. The nonlinear dependence between the distance and angular displacement is derived and quantified analytically. The paper further analyzes the influence of light refraction in the optical window, surface quality and sensor inclination. A procedure for the nonlinear calibration is proposed and used during wind tunnel measurements in a blade cascade with forced oscillation of the middle blade.
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页数：10
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