Abstract:
Film cooling effectiveness has been studied computationally on a cylindrical hole with a streamwise angle of 30°. Reynolds number based on the freestream velocity and hole diameter (ReD) is 10364. Hole length to diameter ratio is 4, representative of gas turbine engines. Coolant plenum is used to act as a sink flow to supply air to cooling hole. The coolant to mainstream density ratio is 0.92. Main flow is supplied at the temperature of 293.15 k and coolant is supplied at 318.15 k. Centerline, local and laterally averaged effectiveness are presented. It is found that two dimensional average increases with increasing blowing ratio upto blowing ratio of 1.0, with further increase in blowing ratio, two dimensionally averaged effectiveness decreases. It is also found that increasing the starting boundary layer thickness from 2.4 to 5.4 increases centerline and laterally averaged effectiveness, but that difference is almost negligible.
Page(s):
218-223
DOI:
DOI not available
Published:
Journal: Proceedings 6th International Bhurban Conference on Applied Sciences and Technology , Volume: 1, Issue: 0, Year: 2009