Characterization of flow disturbances in a coal fired combustion flow train
Audible rumbles are known to accompany operation of the CFFF low mass flow train and visual/aural observations indicate simultaneous dropouts in the diffuser light emission. Three hypotheses, coal flow disturbances, combustion instabilities, and slag entrainment into the flow, are presented as possible causes of the rumbles. Wideband instrumentation including line reversals, luminosities, and dynamic pressures were used to investigate the rumble phenomena. The observational evidence implies that briefly before the rumble sound, the vitation heater pressure rises and a cold opaque structure moves from upstream to downstream through the aerodynamic duct, diffuser, and radiant furnace. Steady state thermodynamic analysis of the flow train at conditions corresponding to measured rumble phenomena are presented. It is concluded that a dispersed structure of slag particles entrained from the combustor is the most viable hypothesis. 8 refs., 23 figs., 2 tabs.
- Research Organization:
- Tennessee Univ., Tullahoma, TN (USA). Space Inst.
- Sponsoring Organization:
- DOE/FE
- DOE Contract Number:
- AC02-79ET10815
- OSTI ID:
- 7175008
- Report Number(s):
- DOE/ET/10815-149; CONF-9006105-6; ON: DE90012632
- Resource Relation:
- Conference: 28. symposium on engineering aspects of magnetohydrodynamics, Chicago, IL (USA), 26-28 Jun 1990
- Country of Publication:
- United States
- Language:
- English
Similar Records
MHD coal-fired flow facility. Quarterly technical progress report, April - June 1981
MHD Coal-Fired Flow Facility. Quarterly technical progress report, October-December 1980