TITLE:
Effects of Particle Stacking Angle on Heat Transfer Characteristics of Particles Close to the Wall
AUTHORS:
Kai Zhang, Peng Sun, Bin Zheng, Jiguo Xu, Youtang Wang, Zhenling Wang, Quanzhen Wang, Yongqi Liu
KEYWORDS:
Stacking Structure, Waste Heat Recovery, Stacking Angle, Particles Close to the Wall, Numerical Simulation
JOURNAL NAME:
World Journal of Engineering and Technology,
Vol.9 No.1,
February
5,
2021
ABSTRACT: The primary energy demand increases, but a large amount of waste heat resources werenot effectively used. To explore the influence of particle stacking structure on waste heat recovery process, CFD method was used to simulate. An unsteady heat transfer model of two particles was established, effect of particle stacking angle on heat transfer characteristics of the particles close to the wall under different initial temperature conditions was studied. Results show that: higher initial temperature, resulting in increased heat transfer time, the larger particle stacking angle causes the shortening of heat transfer time. When initial temperature is 1073K, the average wall heat flux shows a trend of rapid decline first and then a slow one. At the same moment, the larger stacking angle causes smaller particle average temperature. The change of particle stacking angle shows a greater impact on the temperature of the particles close to adiabatic wall. The increase in the stacking angle resulting in better heat transfer characteristics between particles.