Journal
ENERGY REPORTS
Volume 8, Issue -, Pages 131-140Publisher
ELSEVIER
DOI: 10.1016/j.egyr.2022.05.071
Keywords
Particle number concentration; Particle size distribution; Laser diffraction; Pneumatic transport; Synchronous measurement
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Funding
- Science and Technology Plan Project of State Administration for Market Regulation [2019MK071]
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Based on laser-diffraction technique, the maximum entropy technique is applied to measure particle number concentration and size distribution in pneumatic transport. The results show that particle number concentration increases linearly with wind speed, while the mean particle size decreases exponentially within a certain height range.
Based on laser-diffraction technique, the maximum entropy technique is applied to measure particle number concentration and size distribution in pneumatic transport. The information of particle number concentration and size distribution can be obtained simultaneously without distort the fluid and the particle trajectories. Detailed information about the distribution of the particle size and concentration in gas-solid two-phase flows near sand-bed surface are obtained in a large-scale wind tunnel test system. The experimental result shows that particle number concentration increases linearly with the increase of the wind speed. The mean particle size decreases exponentially with height (H > 3 cm), but almost unchanged for H < 3 cm. The weakly relationship of fluctuating velocity and particle-size dispersion is deduced from the underlying mechanism of equilibrium transport. This illustrates that transportation close to the mobile bed has selectivity for particle size. (C) 2022 The Author(s). Published by Elsevier Ltd.
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