Solid particle pre-whirl mixing pneumatic acceleration device and method

Abstract

The invention discloses a solid particle pre-whirl mixing pneumatic acceleration device and method. An acceleration nozzle is of a contraction-straight pipe type or scaling type; the primary air flow generates moderate rotational flow before entering the acceleration nozzle through a specially-designed cyclone or a similar device; the solid particles are directly sprayed to the front part of the nozzle throat in an air flow carrying mode; the solid particles sprayed from a thin pipe are accelerated along the flow direction while generating radial diffusion under the dragging of the rotating air flow; the rotation kinetic energy of the air flow can be gradually dissipated under the mutual effect between the wall surface and the solid particles; the space distribution of the particles is dissipated along with the rotational flow and tends to be stable; and finally, a uniform high-speed air-solid two-phase jet flow is formed. The device and method disclosed by the invention can be used for improving the uniformity of the space distribution of the particles and the speed consistency of the particles, and are of great significance in improving the technology quality of the industrial production of a material thermal spraying technology, sand blasting and the like and improving the test precision of the scientific research field of solid particle erosion acceleration test and the like.

Description

technical field [0001] The invention relates to a method for rapidly aerodynamically mixing and dispersing particles during the aerodynamic acceleration process of solid particles, in particular to a solid particle pre-spinning aerodynamic acceleration device and method. Background technique [0002] Pneumatic acceleration devices for solid particles are often composed of a feeding system, an air source, and an acceleration nozzle. Accelerated and mixed under the drag of the air force, and finally form a high-speed gas-solid two-phase jet. Similar methods and devices are widely used in industrial production and scientific research fields such as material thermal spraying technology, sand blasting treatment, and accelerated erosion test of solid particles. [0003] However, limited by the length of the aerodynamically accelerated diffusion section and the method of particle addition, problems such as particle concentration and uneven spatial distribution often occur, which s...

AI Technical Summary

Problems solved by technology

It is well known that this will change the contact angle of the particle with the surface of the test piece, which in turn will greatly reduce the accuracy of the material erosion test

Images