DEVELOPMENT OF A COMPUTER PROGRAM FOR THE PREDICTION OF SNCR PROCESS OF A
2-D COMBUSTOR

Shin, Mi-Soo; Jang, Dong-Soon; Shin, Na-il; Kim, Dong-Chan; Ohm, Taein

Environmental Engineering Research 2001;6(1): 7-15.

DEVELOPMENT OF A COMPUTER PROGRAM FOR THE PREDICTION OF SNCR PROCESS OF A 2-D COMBUSTOR

Mi-Soo Shin¹, Dong-Soon Jang¹^†, Na-il Shin², Dong-Chan Kim³, and Taein Ohm⁴

¹Department of Environmental Engineering, Chungnam National University, Taejon 305-764, Korea
²Altwell Tech. Inc., Taejon 305-020, Korea
³Korea Institute of Energy Research, Taejon 305-343, Korea
⁴Department of Environmental Engineering, Taejon Industrial National University, Taejon 305-719, Korea

Corresponding Author: Dong-Soon Jang ,Tel: +82-42-821-6677, Fax: +82-42-823-8362, Email: P_dsjang@cnu.ac.kr

Received: June 22, 2000; Accepted: January 22, 2001.

ABSTRACT

A computer program is developed for the prediction of the turbulent reaction associated with selected non-catalytic reaction process. The program is applied to a 2-D axisymmetric hypothetical combustor. The model predicts qualitatively well the concentrations of the NO and NH₃ together with major reactants and products associated with this process. Further, the simulation result suggests that the residence time can be substantially increased by modifying the flow by the baffles mounted vertically on the wall in the gaseous small combustor, which was considered to provide enough reaction time for the NO destruction. For the development of computer program, a control-volume based finite-difference method is used with the Patankar's SIMPLE algorithm. A two-equation k-E and RNG k-E turbulence models are incorporated for Reynolds stresses and the eddy breakup turbulent reaction model is employed for fuel reaction together with the NO reduction process with NH₃. The generation of NO is described using empirical expression. Further, droplet trajectory calculation of NH₃ solution is considered in a Lagrangian frame. The result shows, in general, the possibility of the computer program developed as a viable tool for design and determination of optimal operating condition but program verification is needed against reliable experiment data.

Keywords: combustion | k-E model | SIMPLE | SNCR | turbulent