Structural Analysis and Optimization of Monocular Stereo PIV System for Gas-Liquid Two-Phase Flow

In pursuit of a broad measurement range and high precision standards for monocular stereo particle image velocimetry systems, a model for the structural parameters of monocular stereo PIV system is devised. The model is utilized to analyze the influence of different parameters on three key considerations: the effective field of view width ratio, the effective field of view width ratio within depth of field, and system measurement errors. The examination revealed varying interactions among these considerations with alterations in different structural parameters. Consequently, integration of these three considerations into a genetic algorithm is proposed to derive optimal structural parameters. Employing a high-speed camera with a 35mm focal length, the establishment of a monocular stereo PIV system successfully facilitates the measurement of three-dimensional velocity fields in gas-liquid two-phase flows.