Hydraulic Turbine Vortex Detection and Visualization Using Strain Gauge Sensor

摘要

Hydraulic machinery monitoring using nonintrusive sensors is today's trend in the hydroelectric power industry. The phenomena of cavitation vortex occurs mostly at off-design regimes, which reduces the turbine's efficiency. In this article, we propose a mathematical model for vortex detection and a 3-D vortex presence visualization. Its visualization is constructed on the gyroscope principle, translating the strain gauge vertical elongations into a nutation movement. The mathematical model for vortex detection computes the data statistical moments. The model is tested on experimental data recorded using an extensometer.