65 巻 (1999) 638 号 p. 3406-3413
One of authors has previously reported the fluid dynamic drag of a two-dimensional bluff body cut from a circular cylinder. The height of the portion of body removed from the cylinder is equal to d/2(1-cos θc), where d and θc are the cylinder diameter and the cutting angle (in the case of a circular cylinder θc=0 deg), respectively. The drag coefficient CD takes a small value at around θc=53 deg when Re>Rec (=critical Reynolds number) compared with that of θc=0 deg. In this paper, the heat transfer characteristics around the cylinder are discussed ranging the attack angle θ kept under the condition of θc=53 deg in the range of uniform velocity U∞=10 m/s∼38 m/s. The results obtained are as follows. When θ=90° and CD takes the small value, the mean heat transfer coefficient takes higher value compared with that of the circular cylinder. Moreover, the local heat transfer coefficients around the body do not change so much by the location when θ=90°.