关键词: 输气管道, 肋条减阻, 数值模拟, 湍流边界层, 摩擦阻力

Abstract: In recent years, with the increasing demand for natural gas, more and more attention was paid to the transmission efficiency of gas transmission pipeline. Because the main loss of gas pipeline was the friction resistance, therefore reducing the resistance became the focus of the study. To explore the Vshaped riblets in transmission gas pipeline of drag reduction application, FLUENT was used to simulate two different geometric size of Vshaped riblets. The pipeline drag reduction of bionic riblets could approximate switch into flat gas transmission for numerical simulation. The results of the study showed that: compared with the smooth gas transmission pipeline, Vshaped riblet gas transmission pipeline of the turbulent boundary layer of velocity profile in the logarithmic layer was different| in the same gas velocity inlet, Vshaped riblet at the top of the shear stress was greater than the bottom of the riblet, also riblet on the bottom of the near wall local turbulent kinetic energy was small| the riblet height and spacing size of both 0.90 mm Vshaped riblet pipeline had more drag reduction effect than the size of both 0.51 mm Vshaped riblet pipeline.

Key words: Gas transmission pipeline, Bionic riblet of drag reduction, Numerical simulation, Turbulent boundary layer, Friction resistance