圆柱阵列对微燃烧器换热强化的影响研究

In this paper, a new type of micro-thermophotovoltaic combustor with heat transfer enhancement of staggered cylindrical array is proposed. By numerical simulation, the radiation wall temperature distribution and combustion stability are compared. The results indicate that the wall temperature in cylindrical-array combustor is 74K higher and more uniform with the usable radiation increases 34.55% to 35.98w. Meanwhile, the staggered cylindrical array shows a relatively anchored flame which moves 4.8mm when inlet velocity increases from 4m/s to 16m/s. However, the 0.5~4.5 equivalence ratio range is slightly narrower than 0.4~6.0 in the conventional-channel combustor. To extend the equivalence ratio range, the length of cylindrical array was reduced to 10mm. After improvement, the equivalence ratio range is extended to 0.3~5.5 with a usable radiation of 34.39w and a better wall temperature uniformity.?????