With the rib-induced flow phenomena, the differences in the heat transfer properties over the after-turn region between the straight and tapered ribbed channels were reduced from the smooth-wall scenarios [8]. As the internal coolant network of a gas turbine blade is often formulated by the sharp-turn connected multi-pass channels with various aspect ratios (AR), several previous works investigated the heat/mass transfer characteristics of straight and sharp-turn connected two-pass channels with different AR between 1 and 8
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