TY - JOUR
T1 - Numerical Analysis of Turbulent Flow in a Duct Introducing Two -stage Combustion Air
AU - Furuhata, Tomohiko
AU - Aoki, Hideyuki
AU - Tanno, Shoji
AU - Miura, Takatoshi
AU - Saito, Shozaburo
AU - Ohtani, Shigemori
PY - 1990/1/1
Y1 - 1990/1/1
N2 - To investigate the change of flow characteristics in a duct caused by introducing two-stage combustion (TSC) air, TSC air (80 Nm3/hr.) was introduced tangentially at an axial position of x/D=0.8 through the circumference of a circular duct (0.5m I.D.×2.0m length) of acrylic resin. Two components (axial and tangential) of the mean velocities at x/D=0.5 and 1.5 were measured using a laser-doppler-anemometer. By combining the κ-ɛ two-equation model with a model developed for TSC air, the flow in the duct was analyzed numerically in cylindrical coordinates to compare the results with the measured turbulent flow quantities. Numerical results agreed well with experimental ones and the model developed for TSC air was thus found to be appropriate. These results did not agree, however, with the results by introducing TSC air through one tube as applied to a practical furnace. Three-dimensional analysis must therefore employed.
AB - To investigate the change of flow characteristics in a duct caused by introducing two-stage combustion (TSC) air, TSC air (80 Nm3/hr.) was introduced tangentially at an axial position of x/D=0.8 through the circumference of a circular duct (0.5m I.D.×2.0m length) of acrylic resin. Two components (axial and tangential) of the mean velocities at x/D=0.5 and 1.5 were measured using a laser-doppler-anemometer. By combining the κ-ɛ two-equation model with a model developed for TSC air, the flow in the duct was analyzed numerically in cylindrical coordinates to compare the results with the measured turbulent flow quantities. Numerical results agreed well with experimental ones and the model developed for TSC air was thus found to be appropriate. These results did not agree, however, with the results by introducing TSC air through one tube as applied to a practical furnace. Three-dimensional analysis must therefore employed.
KW - Laser-Doppler-Anemometer
KW - Numerical Simulation
KW - Turbulent Flow
KW - Two-stage Combustion
KW - Velocity Distribution
KW - κ-ɛ Model
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U2 - 10.1252/kakoronbunshu.16.329
DO - 10.1252/kakoronbunshu.16.329
M3 - Article
AN - SCOPUS:84945280703
SN - 0386-216X
VL - 16
SP - 329
EP - 334
JO - Kagaku Kogaku Ronbunshu
JF - Kagaku Kogaku Ronbunshu
IS - 2
ER -