AM05-01-002 乱流摩擦抵抗低減制御におけるエネルギーゲインについて(乱流現象の制御・流れの抵抗低減1,一般講演)

概要

論文の詳細を見る
Discussion is made on the energy gain in turbulence control for friction drag reduction. Based on the dissipation theory, it is mathematically proved that the net power required to drive the flow, i.e., the total power consumption for pumping and control, cannot be reduced to a sublaminar level. This argument is exemplified by direct numerical simulation (DNS) of an idealized feedback control of a turbulent pipe flow flow under a constant flow rate at Re_b=5300 (i.e., Re_γ≃180 for uncontrolled flow). The control input is a body force directly reducing the Reynolds shear stress near the wall. The DNS shows that the skin friction can be reduced to a sublaminar level, but not the net power consumption, in accordance with the present theoretical consequence.
日本流体力学会の論文
2005-09-05