1) chevron mark
山峰纹(薄膜表面的V型纹)
2) riblet
[英]['riblit] [美]['rɪblɪt]
条纹薄膜
1.
Previous methods for computing drag reduction of longitudinal riblets failed to agree well with known experimental data.
采用ＢａｌｄｗｉｎＬｏｍａｘ两层湍流模型，用有限差分法对Ｖ型条纹薄膜的流场进行了计算；分析了条纹薄膜的减阻特性，提出了具有最佳减阻效果的Ｖ型条纹薄膜设计准则。
2.
Based on the structure of turbulent boundary layer, this paper analysises the mechanism of turbulent boundary layer drag reduction with riblets, and studies the effect of drag reduction with riblets through the experment.
本文从湍流边界层的相关结构出发，探讨了条纹薄膜减少湍流边界层阻力的机理，通过平板模型的水洞试验，研究了条纹薄膜的减阻作用。
3) V shape fracture
V型裂纹
1.
When there is plastic area in the Preformed V shape fracture tip,first,the size of plastic area is determined,then,the stress strength factor which is obtained in the case of elasticity is revised.
本文在现有研究工作的基础上,考虑了预制V型裂纹尖端存在塑性区的情况。
4) stub V-thread
V型螺纹
6) threaded surface
带有螺纹的表面
补充资料：马家窑型漩涡纹双耳尖底瓶
马家窑型漩涡纹双耳尖底瓶 新石器时代陶器精品。属马家窑文化马家窑型。1976年甘肃陇西出土。高26厘米。翻沿，长圆腹，尖底，中腹安双耳，红胎。外壁用黑彩绘平行弦纹、漩涡纹和圆点纹。描绘精致、构思奇巧，较为罕见。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条