沈阳航空航天大学学报2025，Vol.42Issue(4)：7-14,8.DOI:10.3969/j.issn.2095-1248.2025.04.002
三角形与梯形沟槽结构减阻特性对比
Comparison of drag reduction characteristics between triangular and trapezoidal groove structure
摘要
Abstract
In order to investigate the drag reduction characteristics of groove structure,triangular and trapezoidal grooves with different dimensions were selected and simulation comparison on the drag reduction characteristics of flat models with two-dimensional transverse,three-dimensional transverse and three-dimensional longitudinal groove arrangements were carried out.The results show that the groove structure can generate low-speed fluid at the bottom of the groove.The low-speed fluid in the transverse groove can act as a rolling bearing.The drag reduction mechanism of the longitudinal groove can be explained from the perspective of protrusion height theory.The low-speed fluid in the grooves reduces the near-wall velocity gradient,thereby reducing friction drag.The groove structure can effectively reduce the turbulent kinetic energy and shear stress,leading to a reduction in viscous drag.The drag reduction effects of the two-dimensional transverse and the three-dimensional transverse groove model is similar,whereas longitudinal grooves exhibit a higher drag reduction rate than transverse grooves.Moreover,trapezoidal grooves achieve a higher drag reduction rate than triangular grooves.The optimal groove dimensions are a width of 0.1mm and a depth of 0.1mm,yielding a maximum drag reduction rate of 18.57%.关键词
沟槽结构/低速流体/湍流动能/减阻特性/减阻率Key words
groove structure/low-speed fluid/turbulent kinetic energy/drag reduction characteristics/drag reduction rate分类
航空航天引用本文复制引用
王巍,周艾,王浩,冯贺..三角形与梯形沟槽结构减阻特性对比[J].沈阳航空航天大学学报,2025,42(4):7-14,8.基金项目
辽宁省自然科学基金(项目编号:2023-MS-243) （项目编号:2023-MS-243）
航空科学基金(项目编号:2020Z006054002) （项目编号:2020Z006054002）
辽宁省教育厅面上项目(项目编号:20240109). （项目编号:20240109）
