叶轮外径 meaning in English

impeller outer diameter

In the first part , the method of velocity coefficient was used to design a 100mm diameter impeller with five single - arc - cylinder blades , and the method of velocity moment was applied to design the volute " s cross - section . the volute " s cross - section is a rectangle , which was designed as a whole structure with the front shroud of the pump . a special lighting window was designed on the side
在第一部分工作中，设计了一个带半开式叶轮的微型泵：叶轮外径100mm 、共5片单圆弧圆柱形叶片；蜗壳采用速度矩法设计，内为矩形断面，和泵壳前盖板为一整体、透明结构，侧面专门设计一个打光窗口。