Abstract
In order to obtain a deeper understanding of the gas flow characteristics of a real boiler, the isothermal flow in a perspex water model of a 12 MW grate-fired boiler has been studied. Comparison between measured and calculated cold flow velocities were made. The model dimensions were 0.24 m width, 0.5 m length and 0.7 m height. The width of the boiler relative to other dimensions were such that the general flow pattern in the study has been treated as two-dimensional. Laser-Doppler-Velocimetry (LDV) measurements of horizontal and vertical velocity profiles including turbulent velocity components were carried out. Measurements were performed in about 230 positions. Numerical calculations were carried out with the fluid flow simulation program FLUENT. Two different grid sizes were used and the k-epsilon turbulence model as well as the Algebraic Stress Model (ASM) have been applied. Standard values of the model constants were used. Comparison between measured and calculated data show acceptable agreement. The mean velocities are qualitatively very well and quantitatively quite well predicted, meaning for example that the extent of the recirculation zones in the upper part of the boiler is quite correctly given by the calculations. For the turbulence quantities, the qualitative agreement is good,
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Citation Formats
Eriksson, Jan, and Tryman, R.
Experimental and theoretical studies of the gas flow in grate-fired boilers; Studier av gasstroemning i rosteldade pannor.
Sweden: N. p.,
1990.
Web.
Eriksson, Jan, & Tryman, R.
Experimental and theoretical studies of the gas flow in grate-fired boilers; Studier av gasstroemning i rosteldade pannor.
Sweden.
Eriksson, Jan, and Tryman, R.
1990.
"Experimental and theoretical studies of the gas flow in grate-fired boilers; Studier av gasstroemning i rosteldade pannor."
Sweden.
@misc{etde_10133926,
title = {Experimental and theoretical studies of the gas flow in grate-fired boilers; Studier av gasstroemning i rosteldade pannor}
author = {Eriksson, Jan, and Tryman, R}
abstractNote = {In order to obtain a deeper understanding of the gas flow characteristics of a real boiler, the isothermal flow in a perspex water model of a 12 MW grate-fired boiler has been studied. Comparison between measured and calculated cold flow velocities were made. The model dimensions were 0.24 m width, 0.5 m length and 0.7 m height. The width of the boiler relative to other dimensions were such that the general flow pattern in the study has been treated as two-dimensional. Laser-Doppler-Velocimetry (LDV) measurements of horizontal and vertical velocity profiles including turbulent velocity components were carried out. Measurements were performed in about 230 positions. Numerical calculations were carried out with the fluid flow simulation program FLUENT. Two different grid sizes were used and the k-epsilon turbulence model as well as the Algebraic Stress Model (ASM) have been applied. Standard values of the model constants were used. Comparison between measured and calculated data show acceptable agreement. The mean velocities are qualitatively very well and quantitatively quite well predicted, meaning for example that the extent of the recirculation zones in the upper part of the boiler is quite correctly given by the calculations. For the turbulence quantities, the qualitative agreement is good, although quite large quantitative discrepancies exist. The results are, in the opinion of the authors, positive enough to motivate further efforts directed towards the modelling of the gas flow in the real boiler.}
place = {Sweden}
year = {1990}
month = {Dec}
}
title = {Experimental and theoretical studies of the gas flow in grate-fired boilers; Studier av gasstroemning i rosteldade pannor}
author = {Eriksson, Jan, and Tryman, R}
abstractNote = {In order to obtain a deeper understanding of the gas flow characteristics of a real boiler, the isothermal flow in a perspex water model of a 12 MW grate-fired boiler has been studied. Comparison between measured and calculated cold flow velocities were made. The model dimensions were 0.24 m width, 0.5 m length and 0.7 m height. The width of the boiler relative to other dimensions were such that the general flow pattern in the study has been treated as two-dimensional. Laser-Doppler-Velocimetry (LDV) measurements of horizontal and vertical velocity profiles including turbulent velocity components were carried out. Measurements were performed in about 230 positions. Numerical calculations were carried out with the fluid flow simulation program FLUENT. Two different grid sizes were used and the k-epsilon turbulence model as well as the Algebraic Stress Model (ASM) have been applied. Standard values of the model constants were used. Comparison between measured and calculated data show acceptable agreement. The mean velocities are qualitatively very well and quantitatively quite well predicted, meaning for example that the extent of the recirculation zones in the upper part of the boiler is quite correctly given by the calculations. For the turbulence quantities, the qualitative agreement is good, although quite large quantitative discrepancies exist. The results are, in the opinion of the authors, positive enough to motivate further efforts directed towards the modelling of the gas flow in the real boiler.}
place = {Sweden}
year = {1990}
month = {Dec}
}