4231 まっすぐな円管内の乱流旋回流の特性 : 弱い旋回流入時の流れの変化(G05-14 管内流・旋回流,G05 流体工学)  [in Japanese] 4231 Characteristics of Turbulent Swirling Flow in a Straight Pipe : Flow Change in Weak Swirling Flow  [in Japanese]

The flow changes in weak swirling flow, which are different from those of non-swirling pipe flow, are described. Tangential velocity of a combined vortex upstream changes to that of a forced vortex downstream. Axial velocity distributions which are constant in the entrance region gradually develop into non-swirling pipe flow's downstream. Also, turbulence which is controlled upstream develops far downstream.