An experimental model for simulating the local primary flow field near the front of outer liner of annular slinger combustor was designed to study the effusion cooling performance. The surface temperature distribution on the perforated plate was measured by the infrared camera

and the effects of blowing ratio

effusion holes-array arrangement

hole diameter and perforated percentage on the overall cooling effectiveness were then compared. Three effusion holes-array arrangements including square-diamond mode

long-diamond mode and super-long-diamond mode were adopted. The hole diameter varied from 0.6mm to 1.0mm

the perforated percentage varied from 3% to 6% and the blowing ratio varied from 1 to 6. The results show that the overall cooling effectiveness increases firstly along the streamwise direction and then decreases downstream due to the existence of recirculation zone in the front of outer liner. The blowing ratio of 2 results in the highest overall cooling effectiveness and the long-diamond holes-array arrangement seems to be advantageous. The decrease of hole diameter is helpful for improving the overall cooling effectiveness under the same perforated percentage. When the perforated percentage increases from 3% to 4.8%

the overall cooling effectiveness is significantly enhanced.