实验流体力学2026，Vol.40Issue(3)：64-78,15.DOI:10.11729/syltlx20240025
融合微吹气的各向同性渗透材料对平板湍流边界层结构的影响研究
Study on the effect of isotropic permeable materials fused with microblowing on the turbulent boundary layer structure of a flat plate
杜海 1李港 2张楷沅 2何云傲2
作者信息
- 1. 西华大学 航空航天学院,成都 610039||西华大学 能源与动力工程学院,成都 610039||西华大学 智能空地融合载具及管控教育部工程研究中心,成都 610039||中国空气动力研究与发展中心 旋翼空气动力学重点实验室,绵阳 621000
- 2. 西华大学 能源与动力工程学院,成都 610039
- 折叠
摘要
Abstract
Viscous drag is one of the main sources of civil aircraft drag,and turbulent drag plays a dominant role in viscous drag,so it is of great engineering and scientific significance to carry out turbulence drag reduction control.In this paper,under the condition of a zero pressure gradient experiment,the drag reduction control of the plate boundary layer with isotropic permeating materials fused with micro-blowing is studied.The results show that the isotropic permeable material can significantly reduce the friction drag of the plate surface,and the maximum local drag reduction rate in this paper can reach 55.4％.In addition,compared with the control of a single isotropic permeable material,the isotropic permeating material integrated with micro-blowing not only improves the drag reduction rate in the local region but also increases the flow area of the downstream drag reduction region due to the"memory"of the influence of micro-blowing on the turbulent structure,improving the efficiency of drag reduction.Hot-wire velocity measurement results show that the isotropic permeable material with microblowing can reduce the velocity gradient of the viscous bottom layer of the boundary layer and reduce the momentum exchange between the inner and outer layers.The flow visualization technology of Time-Resolved Particle Image Velocimetry(TR-PIV)showed that the isotropic permeable material integrated with micro-blowing could increase the thickness of the turbulent boundary layer and the pulsation intensity of the flow direction.At the same time,the large-scale high-speed strip structure in the steam-wise direction break down into small-scale structure.The self-holding process and sweeping process near the wall are suppressed,thus achieving drag reduction.关键词
湍流边界层/微吹气/拟序结构/湍流强度/减阻Key words
turbulent boundary layer/microblowing/coherent structures/turbulence intensity/reduce drag分类
数理科学引用本文复制引用
杜海,李港,张楷沅,何云傲..融合微吹气的各向同性渗透材料对平板湍流边界层结构的影响研究[J].实验流体力学,2026,40(3):64-78,15.
