helical fin 中文意思是什麼
helical fin
解釋
螺旋形肋片-
Various successive partial plastic forming methods for processing groove, including thread rolling, cross rolling and skew rolling, splitting, rolling of spline shaft, split rolling, open - die extrusion of spline shaft / gear, extrusion of internal screwed tooth socket parts with large helical pitch, integral cold forging for slot commutator, extrusion - ploughing for outside fin tube, drawing of tube with spiral internal / external ribs etc. have been introduced briefly
摘要介紹了用於加工槽的各種連續局部塑性成形方法，包括螺紋軋制、橫軋與斜軋、分劈、花鍵軸滾軋、劈分軋制、花鍵軸齒輪開模擠壓、花鍵套擠壓、槽型換向器整體冷鍛、外翅片管擠壓一犁削、內外螺紋管拉拔等。 -
The main works and conclusions in this paper are as follows : 1 、 the two - phase flow patterns are observed in micro - fin helical tube. the flow pattern map is obtained and compared with the map of smooth straight tube, the result of which explains the theory of transformation among the flow patterns in micro - fin helical tube and the pattern difference between helical and straight tube
具體說來有以下內容： 1 、對微肋螺旋管內兩相流動流型進行了實驗觀察，作出了流型圖，並與水平直管流型進行了分析、比較，解釋了兩者間的流型差異和微肋螺旋管流型間的轉變機理。
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