hair pin structure 中文意思是什麼
hair pin structure
解釋
發夾結構-
While slug structure is leaving from computing domain, the successive disturbance develop in downstream direction, the legs of hair - pin vortex approach the wall continuously and induce vortex structures near the wall. the evolution of this near - wall vortex structures brings the secondary transition to turbulence in the pipe flow
隨著塞流結構流出計算域,后繼擾動向下游繼續發展,表現為發卡渦的渦腳向壁面不斷貼近,進而誘發近壁渦結構,近壁渦結構的進一步演化促使圓管流動出現二次轉捩,發展到了湍流階段。 -
Furthermore, hair - pin vortex is closely related with high - shear layer structure and spike structure in the pipe flow
此外,發卡渦與圓管流動中的高剪切層結構以及尖峰密切關聯。 -
Based on these parameters, the present work studies the transition of pipe flow with the different amplitude of psb disturbance. the present work simulates the whole time - space process of the transition from laminar to turbulence and secondary transition phenomenon in pipe flow for the first time. the main structure in pipe flow transition is hair - pin vortex ; the evolution of hair - pin vortex is related with the transition of pipe flow
在這一組參數下,本文研究了不同擾動幅值的psb擾動作用下圓管流動的轉捩過程,首次給出圓管流動從層流轉捩到湍流的時空演化全過程,發現了圓管流動的二次轉捩現象,並進一步揭示了發卡渦是圓管流動轉捩中的主要結構,流動的轉捩過程與發卡渦的演化直接相關。 -
When the legs of hair - pin vortex move to downstream and extend in azimuth direction, they cause the formation of the vortex structure near the wall. this near - wall vortex structure develops to downstream quickly
發卡渦的渦腳在向下游發展的同時沿周向擴展,並誘發近壁渦,該近壁渦沿流向快速擴展。 -
When the psb amplitude is weak, a series of hair - pin vortex will be formed. the formation, diffusion, breakup of the front edge of hair - pin vortex and the break of the head of hair - pin vortex lead to the first instability and form the slug structure
在一定幅值的psb弱擾動作用下,圓管流動中出現一系列發卡渦,發卡渦前緣處環形渦的形成、擴散和破裂以及發卡渦頭部的破碎導致了流動的第一次失穩,產生塞流結構。
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