明渠流动为急流时( )。A. Fr>1 ( Fr为弗劳德数) B. h>hc (h为水深,hc为临界水深)C. v0 (e为断面单位能量)

作者: rantiku 人气: - 评论: 0
问题 明渠流动为急流时( )。
选项 A. Fr>1 ( Fr为弗劳德数) B. h>hc (h为水深,hc为临界水深) C. v0 (e为断面单位能量)
答案 A
解析 提示:判断急流和缓流的标准,流速、水深、Fr数、临界坡度等判别标准均应该记住。

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