平面と曲面で構成される二次元柱の熱伝達特性に関する研究

概要

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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 θ_c), where d and θ_c are the cylinder diameter and the cutting angle (in the case of a circular cylinder θ_c=0 deg), respectively. The drag coefficient C_D takes a small value at around θ_c=53 deg when Re>Re_c (=critical Reynolds number) compared with that of θ_c=0 deg. In this paper, the heat transfer characteristics around the cylinder are discussed ranging the attack angle θ kept under the condition of θ_c=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 C_D 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°.
一般社団法人日本機械学会の論文
1999-10-25