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Energies 2014, 7(4), 2079-2094; doi:10.3390/en7042079

An Experimental Investigation on the Influence of Temperature on the Normal Impact of Fine Particles with a Plane Surface

School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China
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Received: 20 December 2013 / Revised: 23 March 2014 / Accepted: 25 March 2014 / Published: 31 March 2014
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Abstract

This study investigated the rebound behavior of SiO2 particles normally impacting a planar surface under different temperature conditions. The system has been characterized for an aerosol inlet temperature range of 20–190 °C, flow velocities of 0–20 ms−1, and an impaction surface temperature range of 20–140 °C. For the first time, while keeping the same temperature gradient from the high- to low-temperature regions, the influences of varying temperature on the rebound behavior of SiO2 particles normally impacting a plane surface were examined. At increased temperatures, the plastic deformation increases and the coefficient of restitution reduces. The critical velocity is between 0.542 and 0.546 m/s under condition 1 (the carrier gas temperature (Tg) and the impaction surface temperature (TW) remain at room temperature of 20 °C), which increases to between 0.829 and 0.847 m/s under condition 4 (Tg and TW remain at temperatures of 190 °C and 140 °C, respectively). The experimental results show that the critical velocity increases with increasing temperature.
Keywords: temperature; rebound characteristics; impaction experiments; normal restitution coefficient temperature; rebound characteristics; impaction experiments; normal restitution coefficient
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Dong, M.; Xie, J.; Bai, L.; Li, S. An Experimental Investigation on the Influence of Temperature on the Normal Impact of Fine Particles with a Plane Surface. Energies 2014, 7, 2079-2094.

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