Particle impact and observation device and method

Abstract

The invention discloses a particle impact and behavior observation device and a particle impact method. The impact device comprises an acceleration chamber, a separation chamber and an impact chamberwhich are sequentially arranged up and down. The acceleration chamber comprises a mixing section, a reducing section and an acceleration straight section from top to bottom, and an aerosol inlet is formed in the top of the acceleration chamber. The acceleration straight section is embedded into the separation chamber, and an acceleration particle inlet is formed between the separation chamber andthe impact chamber. The observation device further comprises a high-speed image acquisition device and a light source. During observation, liquid is injected into the impact chamber or a flat plate isplaced into the impact chamber to form a two-phase interface, and the light source and the high-speed image acquisition device are aligned to the two-phase interface to acquire high-speed images. Theaccelerating airflow carrying the micron-sized particles enters the acceleration chamber to be accelerated and is separated in the separation chamber, so that the micron-sized particles or liquid drops impact the gas-liquid interface or the gas-solid interface at different angles and speeds, and impact images of the micron-sized particles or liquid drops are obtained. The particle impact and behavior observation device has the advantages of being high in particle impact speed, wide in application range, flexible to use and adjust and the like.

Description

technical field [0001] The invention relates to a particle impact and observation device and method, in particular to the separation and impact of micron-sized particles or droplets, and belongs to the field of aerosol technology. Background technique [0002] The impact of particles or droplets on phase interfaces is a common phenomenon in nature and industrial processes. For example, the process of particle (or droplet) hitting the liquid surface is the basic process of natural wet deposition cleaning atmospheric aerosol and industrial wet spray dust removal, metallurgical spray technology and chemical catalytic reaction; and droplet hitting solid surface is also the basic process of inkjet Applications include printing, surface coating and spray cooling; particle impacts on solid surfaces are also common in industrial equipment. The rich physical phenomena contained in the impact of particles or droplets on the phase interface are also the basic and frontier issues conce...

AI Technical Summary

Problems solved by technology

The process of high-speed impact of micron-sized droplets on the interface can be achieved by using an atomizing nozzle, but there will be high droplet concentration and wide particle size distribution, making it difficult to clearly observe the process of a single droplet impacting the interface on-line

The process of micron-sized particles hitting the interface at high speed can be realized by using the acceleration nozzle to spray aerosol particles, but at the same time, the accelerated air flow will affect the boundary layer at the interface, thereby affecting the liquid surface and the particles during the impact process.

Images