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Title: Simulation of Coal Combustion by AUSM Turbulence-Chemistry Char Combustion Model and a Full Two-Fluid Model
Author: Zhang Y(张宇); Wei XL(魏小林); Zhou LX; Sheng HZ(盛宏至)
Source: Fuel
Issued Date: 2005
Volume: 84, Issue:14-15, Pages:1798-1804
Abstract: An algebraic unified second-order moment (AUSM) turbulence-chemistry model of char combustion is introduced in this paper, to calculate the effect of particle temperature fluctuation on char combustion. The AUSM model is used to simulate gas-particle flows, in coal combustion in a pulverized coal combustor, together with a full two-fluid model for reacting gas-particle flows and coal combustion, including the sub-models as the k-epsilon-k(p) two-phase turbulence niodel, the EBU-Arrhenius volatile and CO combustion model, and the six-flux radiation model. A new method for calculating particle mass flow rate is also used in this model to correct particle outflow rate and mass flow rate for inside sections, which can obey the principle of mass conservation for the particle phase and can also speed up the iterating convergence of the computation procedure effectively. The simulation results indicate that, the AUSM char combustion model is more preferable to the old char combustion model, since the later totally eliminate the influence of particle temperature fluctuation on char combustion rate.
Language: 英语
Indexed Type: SCI ; EI
Corresponding Author: Zhang, Y (reprint author), Chinese Acad Sci, Inst Mech, Beijing 100080, Peoples R China.
Correspondent Email: yuzhang@imech.ac.cn
DOI: 10.1016/j.fuel.2005.03.010
DOC Type: Article
WOS Subject: Energy & Fuels ; Engineering, Chemical
WOS Subject Extended: Energy & Fuels ; Engineering
WOS Keyword Plus: NOX FORMATION ; FLAMES ; FLOWS
WOS ID: WOS:000230940700008
ISSN: 0016-2361
Subject: 力学
Citation statistics:
Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/17423
Appears in Collections:力学所知识产出(1956-2008)_期刊论文

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