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

Ming Dong, Jun Xie, Linying Bai and Sufen Li
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Ming Dong: School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China
Jun Xie: School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China
Linying Bai: School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China
Sufen Li: School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China

Energies, 2014, vol. 7, issue 4, 1-16

Abstract: This study investigated the rebound behavior of SiO 2 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 SiO 2 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 (T g ) and the impaction surface temperature (T W ) remain at room temperature of 20 °C), which increases to between 0.829 and 0.847 m/s under condition 4 (T g and T W 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 (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2014
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