关键词: 固体燃料冲压发动机；外侧面燃烧；燃面退移速率

Abstract: To study the flow field and regression rates of solid fuel ramjet combustion chamber with outboard burning，the flow field of solid fuel ramjet combustion chamber with inner hole and outboard burning were calculated using Fluent software. Results show that for solid fuel ramjet with outboard burning，the value of regression rates on the upper stream of reattachment point is larger，the maximum value of regression rate is 43.5% more than inner hole burning，when the mass flux and total temperature of air are 150g/s and 600K，respectively. Regression rates on the downstream of reattachment point decrease rapidly. With reducing the total air temperature，the regression rates in the fully developed zone increase along the axis. The point that the regression rates start to increase is moved forward，and the increasing rate decrease when the mass flux of air increases. The mean regression rates are smaller 21.9% to 40.5% than inner hole burning as a result of small regression rates in most region. The thrust of outboard burning is lower than that of inner hole burning，but the specific impulse are similar. Temperature of flow field on the surface of aft-mixing combustion chamber and nozzle are 500～1000K less than inner hole burning.

Key words: Solid fuel ramjet；Outboard burning；Regression rate