TY - JOUR
T1 - Detailed measurement and assessment of laminar hydrogen jet diffusion flames
AU - Cheng, T. S.
AU - Wu, C. Y.
AU - Chen, C. P.
AU - Li, Y. H.
AU - Chao, Y. C.
AU - Yuan, T.
AU - Leu, T. S.
N1 - Funding Information:
This research was supported by the National Science Council of the Republic of China under Grants NSC-92-2212-E-216-001 (T.S.C.) and NSC-92-2212-E-006-004 (Y.C.C., T.Y., T.S.L., and T.S.C.), with additional support provided by Chung Hua University (CHU 93-2212-E-216-004). The computer time and CFD package were provided by the National Center for High-Performance Computing, Taiwan, ROC.
PY - 2006/7
Y1 - 2006/7
N2 - Time-averaged, spatially resolved point measurements of temperature, major species concentrations (O2, N2, H2O, H2), and hydroxyl radical concentration (OH) in laminar hydrogen jet diffusion flames (Re = 30 and 330) are performed using nonintrusive UV Raman scattering coupled with the laser-induced predissociative fluorescence (LIPF) technique for assessment of combustion models. Effects of thermal diffusion and chemical kinetics on the flame structure are investigated by comparing computed results with experimental data. Comparisons of the computed temperature and species concentration profiles with experimental measurements are in good agreement for both flames. The numerical simulations, using the Miller and Bowman mechanism, indicate that thermal diffusion affects the flame structure for the Re = 330 flame, whereas its influence becomes minor for the Re = 30 flame. Effects of chemical kinetics on the flame structure are investigated in the Re = 30 flame using five different H2/air reaction mechanisms. Comparisons of the measured and calculated data reveal that this low stretched flame is not very sensitive to the mechanisms used and it may not be suitable for examining the effects of chemical kinetics on the flame structure. Effects of burner wall and coflow boundary conditions on the computed flame structures are also examined in detailed to clarify the importance of boundary conditions in simulating these flames.
AB - Time-averaged, spatially resolved point measurements of temperature, major species concentrations (O2, N2, H2O, H2), and hydroxyl radical concentration (OH) in laminar hydrogen jet diffusion flames (Re = 30 and 330) are performed using nonintrusive UV Raman scattering coupled with the laser-induced predissociative fluorescence (LIPF) technique for assessment of combustion models. Effects of thermal diffusion and chemical kinetics on the flame structure are investigated by comparing computed results with experimental data. Comparisons of the computed temperature and species concentration profiles with experimental measurements are in good agreement for both flames. The numerical simulations, using the Miller and Bowman mechanism, indicate that thermal diffusion affects the flame structure for the Re = 330 flame, whereas its influence becomes minor for the Re = 30 flame. Effects of chemical kinetics on the flame structure are investigated in the Re = 30 flame using five different H2/air reaction mechanisms. Comparisons of the measured and calculated data reveal that this low stretched flame is not very sensitive to the mechanisms used and it may not be suitable for examining the effects of chemical kinetics on the flame structure. Effects of burner wall and coflow boundary conditions on the computed flame structures are also examined in detailed to clarify the importance of boundary conditions in simulating these flames.
UR - http://www.scopus.com/inward/record.url?scp=33745224543&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33745224543&partnerID=8YFLogxK
U2 - 10.1016/j.combustflame.2006.03.005
DO - 10.1016/j.combustflame.2006.03.005
M3 - Article
AN - SCOPUS:33745224543
SN - 0010-2180
VL - 146
SP - 268
EP - 282
JO - Combustion and Flame
JF - Combustion and Flame
IS - 1-2
ER -