System for measuring critical adhesion speed and recovery coefficient of micron particle wall collision
A technology of micron particles and restitution coefficient, which is applied in the direction of measuring devices, flow characteristics, instruments, etc., can solve the problem of particles that are difficult to agglomerate and disperse into single particles, so as to improve the measurement accuracy and avoid the effect of magnification
Active Publication Date: 2020-05-15
TSINGHUA UNIV
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[0005] The purpose of the present invention is to provide a system for measuring the critical adhesion velocity and restitution coefficient of micron particles, which solves the problem that it is difficult to disperse agglomerated particles into single particles in the prior art
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[0034] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0035] Such as Figure 1 to Figure 2 As shown, the embodiment of the present invention provides a system for measuring the critical adhesion velocity and restitution coefficient of micron particles, including a compressed air source 1, a mass flow controller 2, a particle disperser 3, an impact substrate 4, and an optical measurement device. ...
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The invention relates to the technical field of micron particle flow measurement equipment, in particular to a system for measuring critical adhesion speed and recovery coefficient of micron particlewall collision. The system comprises a compressed air source, a mass flow controller, a particle disperser, an impact substrate and an optical measuring device, the mass flow controller is connected with the compressed air source, an inlet of the particle disperser is connected with the mass flow controller, an outlet of the particle disperser is connected with a discharge outlet, and the impact substrate is arranged under the discharge outlet. According to the system for measuring the critical adhesion speed and the recovery coefficient of the micron particle wall collision, the micron-particle polymer to be measured can be effectively dispersed into the single micron-particle to be measured, the influence of fluid drag force on particle movement is corrected, and therefore the measurement accuracy is improved.
Description
technical field [0001] The invention relates to the technical field of micron particle flow measurement equipment, in particular to a system for measuring the critical adhesion velocity and restitution coefficient of micron particle hitting a wall. Background technique [0002] The phenomenon of micron particle impingement widely occurs in nature and industrial processes, such as the deposition of inhalable particulate matter in the trachea, the deposition of fly ash particles in the boiler on the pipe wall, etc. In these micron particle flow problems, the interaction between particles and walls, as one of the important mechanisms of the particle deposition process, is of great significance for accurately estimating the particle deposition rate. To accurately evaluate the wall-impingement behavior and deposition rate of microparticles, it is important to obtain the critical adhesion velocity and restitution coefficient for particle wall-impingement. [0003] The single part...
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IPC IPC(8): G01N15/00G01N11/00
CPCG01N11/00G01N15/00
Inventor 方筑张易阳李晓伟吴莘馨董玉杰张作义
Owner TSINGHUA UNIV