Original title: Annular Jets and Annular Impinging Jets
Authors: Turek, Tomáš ; Trávníček, Zdeněk ; Šafařík, Pavel ; Tesař, Václav
Document type: Papers
Conference/Event: Topical Problems of Fluid Mechanics 2012, Praha (CZ), 2012-02-15 / 2012-02-17
Year: 2012
Language: eng
Abstract: A near field of annular jets and annular impinging jets is experimentally investigated at three inner/outer diameter ratios 0.84, 0.90 and 0.95. Time-mean velocity profiles are evaluated, and three main flow field zones are distinguished – in agreement with the literature, namely the initial merging zone, the intermediate one, and the fully merged one. A distribution of the pressure on the impingement wall is measured for various nozzle-to-wall distances. Two basic annular impinging jet regimes are clearly distinguished, with either small or large recirculation bubbles. Moreover, a hysteretic behavior has been identified under specific parameters.
Keywords: annular jet; bistability; hysteresis
Project no.: CEZ:AV0Z20760514 (CEP), IAA200760801 (CEP), GCP101/11/J019 (CEP)
Funding provider: GA AV ČR, GA ČR
Host item entry: Conference Topical problem of Fluid Mechanics 2012, ISBN 978-80-87012-40-6

Institution: Institute of Thermomechanics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0207784

Permalink: http://www.nusl.cz/ntk/nusl-112191


The record appears in these collections:
Research > Institutes ASCR > Institute of Thermomechanics
Conference materials > Papers