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

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

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,
 and
*
School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China
* Author to whom correspondence should be addressed.
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 which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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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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