Invariants of simple nozzles

0459374 - ÚT 2017 RIV CZ eng C - Conference Paper (international conference)
Tesař, Václav
Invariants of simple nozzles.
ENGINEERING MECHANICS 2016. Praha: Ústav termomechaniky AV ČR, v. v. i., 2016 - (Zolotarev, I.; Radolf, V.), s. 550-553. ISBN 978-80-87012-59-8. ISSN 1805-8248.
[Engineering Mechanics 2016 /22./. Svratka (CZ), 09.05.2016-12.05.2016]
R&D Projects: GA ČR GA13-23046S
Institutional support: RVO:61388998
Keywords : flow invariant * nozzle * reynolds number
Subject RIV: BK - Fluid Dynamics

Paper presents a new concept: invariance of second order. The idea bypasses the necessity geometric similarity (known as allowing only a scaling up or down) in derivation of dimensionless criterial parameters. The approach is demonstrated on the case of family of simple nozzles, the members of the family differing in their lengths of exit channel. While each nozzle is characterised by its primary invariant, characterisation of the whole family leads to two secondary invariants.
Permanent Link: http://hdl.handle.net/11104/0260732