A Numerical Study on Improving Large Angle Film Cooling Performance through the Use of Sister Holes

Film-cooling of cylindrical hole with downstream surface dielectric barrier discharge actuators

“…As for method 1, the effect of CRVP can be reduced by using expanded hole, fan-shaped hole, expansion of fan-shaped hole, laidback hole or sister hole, etc. [8][9][10][11]. As for method 2, the effect of CRVP can be mitigated by adding a neighbor hole in upstream area of the hole, placing discrete tabs or ridge-shaped tabs on holes, adding a ramp at upstream of the hole or embedding holes in trenches, etc.…”

Computational prediction into staggered film cooling holes on convex surface of turbine blade

“…Their result is that the integration of the cooling holes with a continuous slot besides the shape of the hole is of significant effect on the film cooling flow. Ely and Jubran [13] studied a novel sister cooling hole. The blowing ratios were 0.2, 0.5, 1.0 and 1.5.…”

Validation of three dimensional film cooling modeling on convex surface for gas turbine blade

“…Ely and Jubran [10] numerically evaluated a novel sister hole cooling technique. Two sister holes bound the primary injection hole.…”