Tracer particle generator

Abstract

The invention provides a tracer particle generator. A particle containing chamber and a particle homogenizing chamber are of coaxial cylindrical structures. Multiple inclined cyclone pipes are evenly arranged on the annular tabletop of the particle containing chamber in the circumferential direction, multiple horizontal cyclone pipes are evenly arranged on the cylinder wall of the particle homogenizing chamber in the circumferential direction, a first middle vertical pipe is inserted into the particle containing chamber, a second middle vertical pipe is inserted into the particle homogenizing chamber, and a shielding cover is installed at the inlet end. The particle containing chamber contains tracer particles, gas is introduced into the tracer particle generator through the first middle vertical pipe, the inclined cyclone pipes and the horizontal cyclone pipes, and a mixture of the tracer particles and gas flows out through the second middle vertical pipe. By adjusting the gas flow of the first middle vertical pipe, the inclined cyclone pipes and the horizontal cyclone pipes, the concentration of the tracer particles can be conveniently and flexibly adjusted, and the adjusting range of the concentration of the tracer particles is wide. The tracer particle generator is suitable for solid particles and liquid, and switching the liquid and the solid particles can be achieved by replacing outlet nozzles of the inclined cyclone pipes.

Description

technical field [0001] The invention relates to the technical field of fluid velocity field measurement devices, in particular to a tracer particle generator, which is especially suitable for fluid velocity field measurement based on optical means such as laser Doppler velocimeter (LDV) and particle image velocimeter (PIV). instrument. Background technique [0002] Laser Doppler velocimeter (LDV), particle image velocimeter (PIV) and other fluid velocity field measurement instruments based on optical means must release fine particles in the measured flow field when testing the fluid velocity field. Small particles can move with the fluid. When the diameter of these particles is a few microns, the fluid follows very well. It can be considered that the velocity of the small particles is the velocity of the fluid at this position. Therefore, the velocity of these small particles is measured by optical methods. The velocity of the fluid at this location, these small particles a...

AI Technical Summary

Problems solved by technology

Current tracer particle generators can only spread solid particles or liquids, and cannot use both solid particles and liquid droplets; and in order to spread tracer particles evenly, multi-layer screens or filter valves are often used. Improves uniformity, but also increases flow loss and cannot adjust tracer particle concentration over a wide range

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