管径d=100mm，粗糙度为k=0.2mm，管长L=500m,管内流速3m/s，已知处于紊流粗糙区。则其沿程损失为（）m。A. 34.5 B. 43....

作者: tihaiku 人气: - 评论: 0

问题管径d=100mm，粗糙度为k=0.2mm，管长L=500m,管内流速3m/s，已知处于紊流粗糙区。则其沿程损失为（）m。

选项 A. 34.5 B. 43.3 C. 25.2 D. 53.4

答案 D

解析

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