Numerical investigation of the combustion characteristics and nitric oxide formation in a municipal waste incinerator

Numerical analysis has been carried out to investigate the combustion and NO formation and distribution characteristics using a beta probability density function (PDF) method in a three-dimensional municipal waste incinerator by considering the turbulent reacting flow with thermal radiation. For numerical calculation, the multiblock method is adopted to simulate a complex geometry. The program developed has been validated with a commercial program. Considering not only thermal NO but also prompt NO, parametric studies for excess air ratio, secondary air injection, and radiation have been undertaken. By increasing the primary air supply, higher excess air ratio lowers the temperature inside the incinerator so that the amount of NO formation is reduced. When the secondary air injection is considered, more secondary air injection does not always reduce NO formation because of another factor, the equivalence ratio. Additionally, in order to simulate the real situation in an incinerator, nongray gas radiation should be introduced, since including the radiation effect results in lower NO formation because of radiative heat loss.
Publisher
TAYLOR FRANCIS INC
Issue Date
2007
Language
ENG
Keywords

FINITE-VOLUME METHOD; RADIATIVE HEAT-TRANSFER; 3-DIMENSIONAL UNSTRUCTURED GRIDS; MULTIBLOCK; MESHES; RESOLUTION; GEOMETRY; SCHEMES; FLOW; NO

Citation

NUMERICAL HEAT TRANSFER PART A-APPLICATIONS, v.52, no.8, pp.713 - 735

ISSN
1040-7782
DOI
10.1080/10407780701348232
URI
http://hdl.handle.net/10203/6927
Appears in Collection
AE-Journal Papers(저널논문)
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