Method and device for measuring solid particle three-dimensional concentration field and velocity field in gas/solid two-phase stream

Abstract

The invention discloses a kind of method of measurement the solid particle three-dimensional density field in the gas and solid two phase flow, velocity field and equipment. The particle flux transmitting tube is laid at the front of high rate stereoscopic vision system which is consisted by the double look-out angle lens stereoscope and the high rate camera and the jet stream particle is refracted through the double look-out angle lens stereoscope mirror face and the single high rate camera target area can achieve the particle flux graphic with two different angles at the same time and afterthe graphic is input the computer a program module which is consisted by the pattern recognition algorithm procedure and three-inversion projection algorithm procedure treats the particle diagram andthen get the transient three-dimensional density field. The program module treats series microsecond class time sequence changeable particle graphic and gets the particle three-dimensional movement trace and the velocity field. It is stabilize by using the single camera system and overcomes the problem of multiple camera system's constructer is complex and the synchronism is bad.

Description

technical field [0001] The invention relates to a three-dimensional motion characteristic analysis technology of a gas-solid two-phase fluid, in particular to a method and a device for measuring a three-dimensional concentration field and a velocity field of solid particles in a gas-solid two-phase flow. Background technique [0002] The study of gas-solid two-phase flow is an important and cutting-edge topic in the field of turbulent flow research. At present, one of the main research directions for the trajectory of solid particles in gas-solid two-phase flow is the two-phase flow measurement technology, in which the particle image velocity measurement PIV technology And DPIV technology has been widely used and researched due to the advantages of non-contact full-field measurement, simple principle, and convenient implementation. However, the above technologies generally use a sheet light source and a single-lens photography system, which can only obtain two-dimensional pr...

AI Technical Summary

Problems solved by technology

In order to obtain real three-dimensional moving images, multiple cameras can be used to shoot from different angles. The problem of this method is that the system is complex, the investment in equipment is large, the synchronization between different cameras is difficult to grasp, and the parameters of the multi-camera system cannot be fixed. Apply this method to reconstruct There are great difficulties in the trajectory of particles in three-dimensional space

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