In chapter 2 , the basic theory of the principle hugoniot and the methods of fluid velocity measurement are briefly summarized 第二章是本工作的理論基礎(chǔ),簡要討論了測量和制靶的基本原理和方法。
The effective law on the frequence and modal of vibration due to the fluid velocity , the fluid press and the number of elements was obtained 得出流體流速、流體壓力、劃分單元個數(shù)等對管道的頻率和振型的影響規(guī)律。
For best performance swing check valves should operate with fluid velocity sufficient to hold the disc in a stable position off the seat or fully open against the disc stop 為了獲得最好的性能,旋啟式止回閥應該運行在流量速度足夠?qū)㈤y瓣穩(wěn)定支撐在離開閥座的位置,或讓閥瓣停止在全開的位置。