The Crucial Role of Vortical Structure to Jet Swinging Mechanism in a Blind Though Cavity Subjected to a Jet Impingement

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F08%3A00316670" target="_blank" >RIV/61388998:_____/08:00316670 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

The Crucial Role of Vortical Structure to Jet Swinging Mechanism in a Blind Though Cavity Subjected to a Jet Impingement

Original language description

I na blind, retcangular, trough-like cavity subjected to a jet impingement, the jetswitching phenomenon has been known for decades. This is caused by the double-Coanda effect. In the reported research, the TR PIV system was used for the investigation ofthe vortical structure visualized using the ?- criterion. On the results obtained, several phenomena are observed. First, on the edges of the jet, the Kelvin-Helmholtz instability forms "large" vortices, which are further entrained by the fluid and growin size. Second, after the impingement on one of the cavity walls, the flow together with the vortices is bent in the direction towards the cavity opening. At the moment, the vortices start to interact with the just- formed vortices on the edge of the impinging jet-a low pressure zone repsonsible for the jet swingint is created. This phenomenon is investigated for two cavity ratios (2:3 and 3:4), three Reynolds numbers (2300, 11200 and 19600) and four impingement angles (0°, 5°, 10° and

Czech name

Úloha vírových struktur při proudění paprsku v uzavřené dutině

Czech description

V práci je experimentálně zkoumán případ proudění paprsku namířeného do uzavřené dutiny. Dochází k přepínání proudového pole. Experimenty byly provedeny pomocí metody TR-PIV. Je sledováno dynamické chování proudového pole, zejména potom vírové strukturyvznikající mechanismem Kelvin-Helmholtzovy nestability.

Type

D - Article in proceedings

CEP classification

BK - Liquid mechanics

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2008

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

13th International Symposium on Flow Visualization

ISBN

0-9533991-8-4

ISSN

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e-ISSN

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Number of pages

7

Pages from-to

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Publisher name

University of Franche Comté

Place of publication

Besançon

Event location

Nice

Event date

Jul 1, 2008

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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