三角形沟槽面圆管湍流减阻的大涡模拟数值研究

湍流减阻对水上船舶、潜艇、飞机以及长输油管道等运输工具的节能减排具有重要意义。利用大涡模拟(LES)对光滑圆管和三角形沟槽面圆管的流场进行数值研究,验证了LES在非光滑表面圆管湍流减阻研究的可行性,为其他形式的沟槽面圆管的减阻研究提供依据。同时对光滑及沟槽面圆管流场进行分析,并探讨了三角形沟槽的减阻机理。

Large Eddy Simulation on Turbulent Drag Reduction over Triangle Riblet Surfaces of Pipes

Turbulent drag reduction plays an important role in energy consumption and pollution reduction of the transportation, such as ships, submarines, airplane, especially long-distance transport pipeline. Numerical investigation of turbulent flow over smooth surface and triangle riblet surfaces of pipes are carried out using Large Eddy Simulation (LES). The feasibility of using LES to study turbulent drag reduction in triangle riblet surfaces of pipes has been proved, which provides reference basis for drag reduction investigation of other forms of non-smooth surfaces of pipes. The flow field of the smooth surfaces and triangle riblet surfaces of pipes are analyzed and the mechanism of turbulent drag reduction is discussed.