Visual Observation of an Axisymmetric Impinging Jet
Memoirs of the Faculty of Engineering, Yamaguchi University Volume 36 Issue 1
Page 45-49
published_at 1985
Title
軸対称衝突噴流の可視化観察
Visual Observation of an Axisymmetric Impinging Jet
Creators
Kurima Junji
Creators
Miyake George
Creators
Sera Hiroaki
Creators
Miyamoto Masahide
Source Identifiers
The behavior of flow structure of an axisymmetric impinging jet has been experimentally studied by using the flow-visualization techniques, i.e., the hydrogen bubble technique and the fluorescent dye injection. The Reynolds number based on the nozzle diameter (D=40mm) and the nozzle exit velocity is varied in the range of 4000<Re<11000. The growth of vortex-like structures visualized by the hydrogen-bubble and the dye injection is observed either from the jet axis direction or in the jet cross section. When the jet impinges on the plate, the flow structure is varied by the relation between the location of the plate and the rolling up vortex. When the nozzle-to-plate spacing is less than the nozzle diameter, the frequency of occurance of ring vortices is remarkably effected by the impingement plate. With increasing nozzle-to-plate spacing, the frequency of transport of ring vortices decreases due to the coalescence of vortices and the turbulence in the boundary layer increases.
Languages
jpn
Resource Type
departmental bulletin paper
Publishers
山口大学工学部
Date Issued
1985
File Version
Version of Record
Access Rights
open access
Relations
[ISSN]0372-7661
[NCID]AN00244228
Schools
工学部