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Novel particle generation device for nanoparticle plane laser scattering experiment

A particle generation device and nanoparticle technology, which is applied in measurement devices, aerodynamic tests, and testing of machine/structural components, etc., can solve problems such as inaccessibility, inability to obtain experimental results of complex flow fields, and influence on experimental results. Achieve the effect of reducing energy loss, strong scientific research value, and good followability

Active Publication Date: 2020-09-29
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the existing technology is to use titanium dioxide particles as tracer particles, but the quality and diameter of titanium dioxide particles are still relatively large, and particles in the boundary layer and mixed layer near the wall still cannot enter, which affects the experimental results and cannot obtain complex flows. field fine experimental results

Method used

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  • Novel particle generation device for nanoparticle plane laser scattering experiment

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] as attached figure 1 A new type of particle generation device for nanoparticle plane laser scattering experiments is shown, which is suitable for nanoparticle plane laser scattering optical experiments, mainly including heater 1, equivalence channel 3, booster fan 4, shrinkage channel 5, mesh Partition 6, dry ice bin 7, feeding cover 8, lower partition 9, lower diffuser section 10, lower ventilation channel 11, regulating valve 12, mixed gas outlet 14 and gas outlet 15, steam liquid 2 and dry ice are required 13. In this embodiment, the vapor liquid 2 is water; the particle generation device in this embodiment uses dry ice and water as particle generation materials, which not only make the materials easy to obtain, but also make the experimental process more safe and environmentally friendly, effectively avoiding the Health hazards caused by the inhalation of nano-solid particles into the human body; the high-pressure carbon dioxide and water mist mixed gas produced by ...

Embodiment 2

[0053] as attached figure 1 A new type of particle generation device for nanoparticle plane laser scattering experiments is shown, which is suitable for nanoparticle plane laser scattering optical experiments, mainly including heater 1, equivalence channel 3, booster fan 4, shrinkage channel 5, mesh Partition 6, dry ice bin 7, feeding cover 8, lower partition 9, lower diffuser section 10, lower ventilation channel 11, regulating valve 12, mixed gas outlet 14 and gas outlet 15, steam liquid 2 and dry ice are required 13.

[0054] The difference from Embodiment 1 is: the diameter of the mixed gas outlet hole 14: D2=1.5D1=75mm; the diameter of the large end of the constriction channel 5: D4=6D1=300mm; the diameter of the small end of the constriction channel 5: D3=0.6 D4=180mm; the height of the shrinkage channel 5: H4=1.5D4=450mm; the height difference between the lower edge of the mixed gas outlet hole 14 and the lower edge of the dry ice bin 7: H3=4D3=720mm, to achieve larger...

Embodiment 3

[0056] as attached figure 1 A new type of particle generation device for nanoparticle plane laser scattering experiments is shown, which is suitable for nanoparticle plane laser scattering optical experiments, mainly including heater 1, equivalence channel 3, booster fan 4, shrinkage channel 5, mesh Partition 6, dry ice bin 7, feeding cover 8, lower partition 9, lower diffuser section 10, lower ventilation channel 11, regulating valve 12, mixed gas outlet 14 and gas outlet 15, steam liquid 2 and dry ice are required 13.

[0057] The difference from the first embodiment is that the diameter of the air outlet 15 is D1=80mm, the rated power of the heater 1 is 1500W to achieve faster particle generation, and the other parts and use process are the same as the first embodiment.

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Abstract

The invention discloses a novel particle generation device for a nanoparticle plane laser scattering experiment, which comprises a main body and a heater, wherein an equivalent channel is formed abovethe heater; the middle of the equivalent channel is fixedly provided with a pressurizing fan, the top extends upwards to form a shrinkage channel with the large lower end and the small upper end, theend, which is away from the equivalent channel, of the shrinkage channel is communicated with a dry ice bin, a mixed gas outlet is formed in the end, which is away from the shrinkage channel, of thedry ice bin and is communicated with a gas outlet, and the other end of the gas outlet is communicated with a water mist concentration adjusting device. According to the novel particle generation device for the nanoparticle plane laser scattering experiment, steam liquid is heated by the heater to form hot steam, the hot steam enters the dry ice bin through the equivalent channel and physically reacts with the dry ice, heat in the hot steam is rapidly absorbed in the dry ice sublimation process, the hot steam is condensed into nanoscale water mist, the nanoscale water mist is continuously crushed under continuous impact of a large amount of generated carbon dioxide, and thus the diameter of water mist particles is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of optical flow display experiments, in particular to a particle generation device for a novel nanoparticle plane laser scattering experiment. Background technique [0002] To advance the continuous advancement of aerospace technology, accurate optical measurements of complex flow fields are beneficial to improve the understanding and analysis of flow mechanisms. Nanoparticles have small particle size, large specific surface area, orderly arrangement of internal atoms and some new physical and chemical properties, showing unique volume effect and surface effect, zero-dimensional fullerene, one-dimensional carbon nanotube, two-dimensional Graphene has its own unique performance characteristics and has a wide range of application prospects. In the optical experiment of nanoparticle planar laser scattering, the smaller the tracer particle, the better the tracking of the particle, and the more accurate the meas...

Claims

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Application Information

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IPC IPC(8): G01M9/06
CPCG01M9/067
Inventor 顾瑞孙明波赵玉新蔡尊陈健姚轶智王泰宇董泽宇
Owner NAT UNIV OF DEFENSE TECH