Investigation of heat transfer and combustion in the advanced fluidized bed combustor (FBC)

This technical report summarizes the research work performed and progress achieved during the period of October 1, 1994 to December 31, 1994. The measurement of gas flow continued with the assumption of axisymmetric flow in the laboratory-scale FBC. The gas axial velocity distributions at two cross-section in the test chamber were presented. The circulating flow is relatively strong (swirl number of 3.0) near the freeboard wall for the two cross-sections because the flow has high reversal air velocity. The recirculation flow had weak air velocity when the swirl number of 0.60. For the non-swirling flow, the axial velocity was low near the freeboard wall. However, no circulating flow was observed at the two cross-sections. The measurement of the gas axial velocity will be continued to observe the effect of the secondary air injection angles