TURBOMACHINE BLADE TRAILING EDGE COOLING CIRCUIT WITH TURN PASSAGE HAVING SET OF OBSTRUCTIONS

A turbomachine blade (130), and a coupon (270) for a turbomachine blade (130), are disclosed. The blade (130) may include an airfoil body (136) having a pressure side (140) and a suction side (142) connected by a leading edge (144) and a trailing edge (146), a coolant feed passage (204) defined in the airfoil body (136), and a coolant reuse passage (206) defined in the airfoil body (136). The blade (130) may also include a first cooling circuit (200) defined in the airfoil body (136). The first cooling circuit (200) may include a rearward passage (220) extending toward the trailing edge (146) from and fluidly coupled to the coolant feed passage (204), and a radially extending return passage (220) extending away from the trailing edge (146) toward and fluidly coupled to the coolant reuse passage (206). The cooling circuit (200) may also include a radially extending turn passage (230) coupling the rearward passage (220) and the radially extending return passage (222). A first set of obstructions (224) may be positioned in the radially extending turn passage (230).