Characterization of flow disturbances in a coal fired combustion flow train

Conference · Mon Jan 01 04:00:00 EST 1990

OSTI ID:7175008

Winkleman, B C; Giel, T V; Lineberry, J T; Yang, D J

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
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
300102* -- MHD Generators-- Performance & Testing
CARBONACEOUS MATERIALS
COAL
COAL-FIRED MHD GENERATORS
COMBUSTORS
DIFFUSERS
DIRECT ENERGY CONVERTERS
ENERGY SOURCES
FOSSIL FUELS
FUELS
MATERIALS
MHD GENERATOR CFFF
MHD GENERATORS
NOISE
OPERATION
PERFORMANCE
SLAGS