Laser-doppler velocimeter measurements in simulated entrained gasifier flows
Article first published online: 17 JUN 2004
Copyright © 1989 American Institute of Chemical Engineers
Volume 35, Issue 8, pages 1304–1314, August 1989
How to Cite
Lindsay, J. D., Hedman, P. O. and Smith, P. J. (1989), Laser-doppler velocimeter measurements in simulated entrained gasifier flows. AIChE J., 35: 1304–1314. doi: 10.1002/aic.690350809
- Issue published online: 17 JUN 2004
- Article first published online: 17 JUN 2004
- Manuscript Revised: 12 MAY 1989
- Manuscript Received: 16 SEP 1988
A laser-Doppler velocimeter (LDV) was used in a cold-flow study of a simulated entrained-flow coal gasifier. The study was designed to provide fundamental information about the flows in such a gasifier and to provide data for the validation of a turbulence submodel used in modeling combustion processes. Measurements in 20 swirling and nonswirling flow cases were made with several levels of replication. This study emphasized the effects of inlet conditions on flow properties within the simulated reactor.
Unsteady flow phenomena with time scales on the order of seconds to minutes were sometimes observed. The unsteadiness was apparently associated with relaminarization-type flow transitions.
Comparisons were made with model predictions from PCGC-2, a model for combustion processes based on the k, — ϵ turbulence model. Several areas of weakness in the model results were observed, but the unusual flow regimes measured in this study may be beyond the abilities of practical computer models.