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2013 | OriginalPaper | Chapter

Large-Eddy Simulation of Pulverized Coal Combustion in Swirling Flow

Authors : K. Tanno, H. Watanabe, N. Hashimoto, R. Kurose, H. Shirai

Published in: Cleaner Combustion and Sustainable World

Publisher: Springer Berlin Heidelberg

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Abstract

Large-eddy simulation (LES) is applied to both a pulverized coal combustion and non-combustion field in a combustion test furnace with a practical advanced low NO_x burner called CI-α burner, and investigated the effect to coal combustion on flow field and ignition mechanism. The results show that predicted flow field and coal particle behavior are in general agreement with the experiment. Coal combustion strongly affect flow filed. Primary air jet and swirling flow is enhanced by the burned gas expansion. Moreover, a recirculation flow formed by strong swirling flow is observed near the burner region and keeps stable coal combustion by transporting hot gas and increasing coal particle residence time.

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Title: Large-Eddy Simulation of Pulverized Coal Combustion in Swirling Flow
Authors: K. Tanno
H. Watanabe
N. Hashimoto
R. Kurose
H. Shirai
Publisher: Springer Berlin Heidelberg
Book: Cleaner Combustion and Sustainable World
Print ISBN: 978-3-642-30444-6

Electronic ISBN: 978-3-642-30445-3

Copyright Year: 2013
DOI: https://doi.org/10.1007/978-3-642-30445-3_135