Stabilizing dimple for combustion liner cooling slot

In a combustor liner film cooling slot of the variety including an annular space extending circumferentially of the liner and defined between overlapping portions of telescoping liner segments, a cooling fluid plenum substantially circumscribing the liner, means for transferring cooling fluid from the plenum to the space, means for exhausting fluid from the space onto the liner, and an overhanging lip extending substantially axially downstream of the space for facilitating attachment of the fluid to the liner in a protective film barrier, the improvement comprising:

• a stabilizing dimple disposed within said lip, the dimple including a substantially radially depressed portion, the depressed portion having a first radial height proximate its upstream extremity, a second radial height at its downstream extremity, said second radial height being greater than said first radial height, said depressed portion further including an intermediate segment intermediate said upstream and downstream extremities and having a radial height substantially equal to said second radial height.