Heat Transfer Characteristics in a Flow Channel Having a Single Row of Inclined V-Shaped Pins Mounted on the Endwall Surface
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Abstract
The objective of this research is to study heat transfer characteristics and thermal performance with a single row of inclined V-shaped pins in a flow channel. The cylindrical pins, each having a diameter of D=10 mm, were mounted on the heat transfer surface in a wind tunnel. The height of the pin was investigated at H=3.2D and H=2D. The pin-to-pin distance was fixed at Sy=2D in the spanwise direction. The effects of pin inclined angle were investigated at θ=30o, 45o, 60o, 90o, 120o, 135o, and 150o. The temperature distributions on the heat transfer surface were measured by using an infrared camera. Results for the case H/D=2 show that the V-shaped pin inclined angle of θ=30o, 45o, 60o, 120o, and 135o could enhance heat transfer downstream of the pin row when compared to the case of vertical pins with =90o. In the case where H/D=3.2, the heat transfer on the endwall surface with inclined V-shaped pins was poorer than that with vertical pins with =90o. The pressure drops in cases where H/D=2 and H/D=3.2 were reduced with mounting inclined V-shaped pins when compared to the case of vertical pins with =90o.
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