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Large-Eddy Simulation on a Pulverized Coal Combustion Furnace With a Complex Burner

[+] Author Affiliations
Hiroaki Watanabe, Kenji Tanno

Central Research Institute of Electric Power Industry, Yokosuka, Kanagawa, Japan

Ryoichi Kurose, Satoru Komori

Kyoto University, Kyoto, Japan

Paper No. AJK2011-12007, pp. 3149-3154; 6 pages
doi:10.1115/AJK2011-12007
From:
  • ASME-JSME-KSME 2011 Joint Fluids Engineering Conference
  • ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 1, Symposia – Parts A, B, C, and D
  • Hamamatsu, Japan, July 24–29, 2011
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 978-0-7918-4440-3
  • Copyright © 2011 by JSME

abstract

Large-eddy simulation (LES) is applied to a pulverized coal combustion field in a combustion test furnace with a practical advanced low NOx burner called CI-α burner, and its validity is investigated by comparing with the experiment. The motion of coal particles is calculated by the Lagrangian method with a parcel model. In the coal combustion modeling, three chemical processes are considered, namely devolatilization, char combustion and gaseous combustion. The direct closure SSFRRM (scale similarity filtered reaction rate model) is used as a turbulent combustion model. The results show that a swirling recirculation flow is formed in the central region close to the burner and its size and strength dynamically change with time. The predicted distributions of gaseous temperature and oxygen are in general agreement with the experiment.

Copyright © 2011 by JSME

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