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论基础,简要讨论了测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 得出流体流速、流体压力、划分单元个数等对管道的频率和振型的影响规律。
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 为了获得最好的性能,旋启式止回阀应该运行在流量速度足够将阀瓣稳定支撑在离开阀座的位置,或让阀瓣停止在全开的位置。