THE THEORETICAL ANALYSIS AND EXPERIMENTAL RESEARCH OF CONVECTIVE HEAT TRANSFER OF DILUTE GAS-SOLID TWO-PHASE FLOW ACROSS CIRCULAR TUBES

摘要

The convective heat transfer of dilute gas-solid two-phase flow across the circular tubes is researched in this paper. Based on the theoretical analysis, the experimental research is carried out in the dilute gas-solid mixture zone which is on the top of circulating fluidized bed test model. The experimental results show that the ratio of convective heat transfer coefficients between dilute gas-solid two-phase flow and the air flow when across the circular tubes is mainly affected by the density of dilute gas-solid two-phase mixture and the average diameter of fluidizing particles. By means of handling experimental data, the criterion equation used to dilute gas-solid two-phase flow across circular tubes is obtained.