间隙高度受限条件下纵向沟槽的减阻特性研究

巨康; 赵卓斌; 邓清华; 李军

doi:10.7652/xjtuxb202609015

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间隙高度受限条件下纵向沟槽的减阻特性研究

更新时间：2026-09-04

- 间隙高度受限条件下纵向沟槽的减阻特性研究
- Drag Reduction Characteristics of Longitudinal Grooves under Limited Gap Height Conditions
- 西安交通大学学报 2026年60卷第9期页码：154-164
- 作者机构：
  
  西安交通大学能源与动力工程学院，710049，西安
- 作者简介：
  
  作者简介：巨康（2001—），男，硕士生；
  邓清华（通信作者），男，教授，博士生导师。
- 基金信息：
  
  国家重点研发计划资助项目(2023YFB4102203);国家自然科学基金联合基金资助项目(U20A20303)
- DOI：10.7652/xjtuxb202609015
  中图分类号： TK14
- 收稿：2026-01-27，
  
  网络首发：2026-04-22，
  
  纸质出版：2026-09-10
- 稿件说明：
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巨康, 赵卓斌, 邓清华, 等. 间隙高度受限条件下纵向沟槽的减阻特性研究[J]. 西安交通大学学报,2026,60 (9):154-164. https://doi.org/10.7652/xjtuxb202609015.

JU Kang, ZHAO Zhuobin, DENG Qinghua, et al. Drag Reduction Characteristics of Longitudinal Grooves under Limited Gap Height Conditions[J]. Journal of Xi'an Jiaotong University,2026,60 (9):154-164. https://doi.org/10.7652/xjtuxb202609015.
巨康, 赵卓斌, 邓清华, 等. 间隙高度受限条件下纵向沟槽的减阻特性研究[J]. 西安交通大学学报,2026,60 (9):154-164. https://doi.org/10.7652/xjtuxb202609015. DOI：

JU Kang, ZHAO Zhuobin, DENG Qinghua, et al. Drag Reduction Characteristics of Longitudinal Grooves under Limited Gap Height Conditions[J]. Journal of Xi'an Jiaotong University,2026,60 (9):154-164. https://doi.org/10.7652/xjtuxb202609015. DOI：

摘要

针对纵向沟槽在间隙高度受限场景下减阻特性不明晰的现状，通过数值方法研究了6种形状纵向微沟槽在不同受限间隙高度下的减阻情况。从速度梯度、摩擦切应力、平均速度分布、湍流动能和流向涡量5个方面深入探讨了其减阻机制，比较了各种槽形的减阻性能，分析了沟槽的无量纲横截面积和无量纲湿润周长对减阻性能的影响规律。结果表明：纵向沟槽能够有效减缓速度梯度，降低摩擦切应力和湍动能峰值，抑制流向涡，使得矩形沟槽和半圆形沟槽的减阻效果最好，梯形沟槽次之；当无量纲沟槽宽度、无量纲横截面积和无量纲湿润周长分别为18、13和40左右时，各种纵向沟槽的减阻效果达到最佳，且增加法向湿润周长可使得槽谷两端摩擦切应力大幅度下降，减阻区域增大，减阻效果提升；随着间隙高度增加，减阻效果增加，且逐渐趋于稳定，矩形沟槽在间隙高度为80倍沟槽宽度时，可减阻4.2%。研究结果可为纵向沟槽截面形状和尺寸优化提供技术支撑，同时为间隙高度受限条件下的湍流减阻提供参考。

Abstract

To clarify the drag reduction characteristics of longitudinal grooves under limited gap height conditions

the drag reduction performance of six types of longitudinal microgrooves at different limited gap heights is investigated numerically.The drag reduction mechanisms are examined from five aspects：velocity gradient

frictional shear stress

mean velocity distribution

turbulent kinetic energy

and streamwise vorticity.The drag reduction performance of various groove shapes is compared

and the effects of the dimensionless cross-sectional area and dimensionless wetted perimeter on drag reduction performance are analyzed.It is shown that the velocity gradient and frictional shear stress are effectively reduced

the peak turbulent kinetic energy is lowered

and streamwise vortices are suppressed by longitudinal grooves.The best drag reduction is achieved by rectangular and semicircular grooves

followed by trapezoidal grooves.Optimal drag reduction is achieved when the dimensionless groove width

dimensionless cross sectional area

and dimensionless wetted perimeter are approximately 18

and 40

respectively.Furthermore

the frictional shear stress at both ends of the groove valley is significantly reduced by increasing the normal wetted perimeter

thereby enlarging the drag reduction region and enhancing the drag reduction effect.As the gap height increases

the drag reduction effect is enhanced and gradually stabilizes.At a gap height 80 times the groove width

a drag reduction of 4.2% is achieved by rectangular grooves.The results provide technical support for optimizing the cross-sectional shapes and dimensions of longitudinal grooves and a reference for turbulent drag reduction under limited gap height conditions.

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