Study on Characteristrics of Nanopowder Continuous High Pressure Dispersing System

Yuan Fangyang; Cui Zhengwei

doi:10.13433/j.cnki.1003-8728.20190270

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Yuan Fangyang, Cui Zhengwei. Study on Characteristrics of Nanopowder Continuous High Pressure Dispersing System[J]. Mechanical Science and Technology for Aerospace Engineering. doi: 10.13433/j.cnki.1003-8728.20190270

Citation:

Yuan Fangyang, Cui Zhengwei. Study on Characteristrics of Nanopowder Continuous High Pressure Dispersing System[J]. Mechanical Science and Technology for Aerospace Engineering. doi: 10.13433/j.cnki.1003-8728.20190270

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Study on Characteristrics of Nanopowder Continuous High Pressure Dispersing System

doi: 10.13433/j.cnki.1003-8728.20190270

Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology, Jiangnan University, Jiangsu Wuxi 214122, China

Received Date: 2019-06-30
Available Online: 2020-12-29

Abstract

Abstract

A continuous dispersing device for deagglomerating ultrafine particles is established. The experimental results show that nanoparticles can be dispersed to the primary particle size range via a continuous jet dispersion system. In order to investigate the mechanism and high-pressure dispersion characteristics of high pressure dispersion, the secondary jet dispersion of dry-powder nanoparticles was modeled and numerical simulated. The results show that numerical results of dynamic pressure profile agree with experiments. The particle number density decreases along the flow direction, and the experimental data is lower than the simulation results. The high pressure dispersing nozzle should not be too long to avoid re-agglomeration of the particles when passing through the nozzle. The aspect ratio of nozzle near 2.5 can produce the maximum shear rate at the jet outlet to obtain the best particle dispersion effect.
- nanoparticles,
- computational fluid dynamics,
- compressible flow,
- pressure,
- aspect ratio

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References(30)

References

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