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The Wall Jet Formed on an Abrupt Drop Boundary Downstream of an Apron

Memoirs of the Faculty of Engineering, Yamaguchi University Volume 30 Issue 2 Page 205-214
published_at 1980
KJ00000156297.pdf
[fulltext] 688 KB
Title
水たたき下流段落面上の壁面噴流
The Wall Jet Formed on an Abrupt Drop Boundary Downstream of an Apron
Creators Saitou Takashi
Creators Ohnari Hirofumi
Creators Akashi Nobuyoshi
Creators Fukada Mitsuo
Source Identifiers
The experiments on the character of flow along an abrupt drop boundary at downstream of an apron are performed. From measurement of velocity distribution, it makes evident that the main flow along an abrupt drop boundary downstream of an apron can be devided in to three regions, accelated, constant and decreased velocity region. The character of main flow, variation of maximum velocity, growth of charactristic width of main flow, non-dimentional eddy viscocity of jet-like main flow and etc, are determined experimentaly. Under the main flow model as decided above, the growth of boundary layer and the coefficient of local skin friction was calculated. The calculated results are good agreement with each experimental results. From this agreement, we confirm that the presented velocity low (friction low) will be help to make clear the mechanism of local scour and the criterion for scour downstream of an apron, and to make up basic relationships for determining the length of an apron.
Subjects
土木工学 ( Other)
Languages jpn
Resource Type departmental bulletin paper
Publishers 山口大学工学部
Date Issued 1980
File Version Version of Record
Access Rights open access
Relations
[ISSN]0372-7661
[NCID]AN00244228
Schools 工学部