摘要
设计直管阻力实验时，为获得比较完整的Ｒｅ－λ曲线，且尽量减少测量误差，本文提出设计较宽的Ｒｅ值变化范围，如从４×１０３到１×１０５；设计足够长的测压段长度；选取流量范围宽的流量计，如文丘里或喷嘴等；选取适宜的压差计指示液，如ＣＣｌ４等。
In order to gain the perfect Reλ chart and to reduce the testing error as possible in the experimental design of straight pipe resistance,the change range of value Re is designed broad,as from 4×10~3 to 1×10~5,the Iength for pressure measuring Iength is designed sufficiently,the flow meter is selected brond flowrate,as venturimeter or spray nozzle etc,and the suitable index medium of differential manometer is selected as CCl_4 etc.
关键词
直管
阻力实验
雷诺数
摩擦系数
流体流动
流量
experiment on straight pipe resistance
Reynolds number
coefficient of friction
