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The local scour from flows at downstream of an outlet : Intermittent scour

Memoirs of the Faculty of Engineering, Yamaguchi University Volume 28 Issue 2 Page 175-180
published_at 1978
KJ00000156196.pdf
[fulltext] 588 KB
Title
水門下流部における洗堀 : 間欠的洗堀
The local scour from flows at downstream of an outlet : Intermittent scour
Creators Saitou Takashi
Creators Ohnari Hirofumi
Creators Akashi Nobuyoshi
Creators Kameda Yoshimitsu
Source Identifiers
In previos investigation which is concerned with the local scour in case of the water depth downstream of an outlet was deep sufficiently, it becomes clear that the shape of scoured fall and an increasing rate of maximum scoured depth almost coincide quantitatively theoretical curve based on scour model have been proposed by the auther. In practical case, there are not a little instance of shallow water depth downstream of an outlet, and under such circumstance we often fined the phenomenon that in the process of scour direction of issuing flows turn to upward (separated flow) from downward (reattached flow). The authers called this phenomenon 'intermitent scour' downstream of an outlet. This time we make an experiment of scour from flows downstream of an outlet with systematic change of water depth downstream, and attempt to explain the intermitent scour phenomenon in relation to the propertys of curved jets which reattached to flat plate steped down, and it has been became clear experimentaly that the maximum scoured depth at constant non-dimentional time was so decrease as to shallow the water depth downstream.
Subjects
土木工学 ( Other)
Languages jpn
Resource Type departmental bulletin paper
Publishers 山口大学工学部
Date Issued 1978
File Version Version of Record
Access Rights open access
Relations
[ISSN]0372-7661
[NCID]AN00244228
Schools 工学部