The Fluent software was applied to carry out three dimensional simulation on film cooling efficiency of the coolant corssflow and flow and temperature field distributions of the injection hole

under conditions with the mainstream Reynolds number of 9600

the blowing ratio of 0.5

1.0and 2.0

and the crossflow velocity ratio of 0.3

0.5and 0.7.The results show that

with the blowing ratio of 1.0

the cross-flow velocity ratio affected the mass flow rate distribution at the two outlets the most.When the low blowing ratio is low(of 0.5)

the cross-flow ratios had weak influence on the film cooling effectiveness.At the moderate blowing ratio of 1.0

the film cooling effectiveness decreased when the cross-flow ratios increased.At the high blowing ratio of 2.0

the cross-flow ratios had complex influence on the laterally averaged film cooling effectiveness and weak influence on the surface averaged film cooling effectiveness.