Design Investigation of Annular Combustor with Slinger and Compacted Effusion Cooling Holes

In order to design annular combustor with slinger and compacted effusion cooling holes, two kinds of comparative methods on effusion cooling holes are conducted according to the flow field of flame tube without effusion cooling holes and the desirable multi-vortexes flow field. For comparing the effectiveness of these two methods, the combustion field of combustors has been simulated. The computational results indicate that adding the number of effusion holes to adjust the gas distribution of jet holes of outer and inner liner can induce the multi-vortexes flow fields, and the cooling effectiveness of method 2 is better. It shows that adjusting the number of holes to change the air penetration distance of jet holes and using the atomized fuel from slinger can induce the desirable flow field. The effusion cooling holes with obtuse angle to the mainstream can protect the first rows of flame tube with large heat load better. Increasing porosity of holes array and changing the diameter of holes from 0.68mm to 0.3~0.55mm can enhance heat transfer and reduce the wall temperature without changing cooling air mass flow.