| 摘要 |
Cooling film effectiveness is increased in multi-hole film cooled combustor liners having dilution holes by altering the orientation of the film cooling holes in the vicinity of the dilution holes. The cooling holes include a first group of cooling holes angled in a first circumferential direction and a second group of cooling holes angled in a second circumferential direction, opposite to the first circumferential direction. The cooling holes in the second group of cooling holes are located between adjacent ones of the dilution holes so as to direct cooling air to the regions immediately downstream of the dilution holes. Groups of oppositely directed cooling holes can be used with other hot spot regions on the liner, such as those caused by borescope holes, igniter ports and swirling combustor gases.
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