Reconstruction of velocity distribution in gas-solid two-phase flow based on two-layer array fan-beam optical sensor

Abstract

This paper presents a novel approach that adopts full-orientated two-layer fan-beam optical sensor to measure the particle velocity. The scanning light source emit a 50 o lamellar fan-beam in turn through the gas-solid two phase flow, and the projection data resulting extinction effect of solid particles are detected at the same time. The profile optical projection data of measured flow field of the two layers can be obtained through being stimulated array light source and detecting light signal at multiple angles in space, and the vertical velocity field can be reconstructed during the course of measurement in terms of two-dimension cross-correlation and backprojection algorithm. In this paper, the design of the sensor including spatial arrangement of the structural parts and basic principle are introduced, the mathematical model utilized for measuring the particle velocity is presented and the experimental results are shown. It provides a new means to reconstruct rapidly velocity field of the gas-solid two-phase flow.