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- W2387145875 abstract "A large scale cold model experimental setup of a coupled reactor mainly composed of lower riser and upper fluidized bed was established.The particle flow behavior in the riser of the setup was measured by using PV-4A optical fiber velocity apparatus.Furthermore,the downward particle distribution and its effects on the particle flow in riser section were investigated.The experimental results showed that in axial direction,downward particles in the accelerating region and fully development region of the riser distributed mainly in the region close to wall with the non-dimensional radial position r/R≥0.90.Downward particle fraction was mainly affected by solid-gas ratio,that is,cross-sectional averaged downward particle fraction with larger solid-gas ratio was more than that with smaller solid-gas ratio.The distribution of downward particles in the outlet restriction region extended to r/R≥0.70 and the downward particle fraction was mainly affected by outlet restriction resistance,which increased with an increase of outlet restriction resistance.In radial direction,downward particle mainly affected the particle velocity in the region close to wall.With considering downward particle effects,the cross-sectional averaged particle velocity was about 0.8 times to that without considering downward particle effects in the fully development region,while in the accelerating region and restriction region it increases with a little more than 0.8 times.Furthermore,quantitative conversion correlation equation of local and cross-sectional averaged particle velocities in the riser section with considering downward particle effects was obtained based on the experimental data and theoretical analysis." @default.
- W2387145875 created "2016-06-24" @default.
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- W2387145875 date "2011-02-25" @default.
- W2387145875 modified "2023-09-27" @default.
- W2387145875 title "Downward Particle Distribution and Its Effects on Particle Flow in the Riser Section of Riser-Fluidized Bed Reactor" @default.
- W2387145875 doi "https://doi.org/10.3969/j.issn.1001-8719.2011.01.012" @default.
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