Recent advances in characterisation of subsonic axisymmetric nozzles

0482234 - ÚT 2019 RIV FR eng C - Conference Paper (international conference)
Tesař, Václav
Recent advances in characterisation of subsonic axisymmetric nozzles.
EPJ Web of Conferences. Vol. 180. Les Ulis: EDP Sciences, 2018 - (Dančová, P.), č. článku 02107. E-ISSN 2100-014X.
[Experimental Fluid Mechanics 2017. Mikulov (CZ), 21.11.2017-24.11.2017]
R&D Projects: GA ČR(CZ) GA17-08218S
Institutional support: RVO:61388998
Keywords : nozzle * reynolds number * euler number
OECD category: Fluids and plasma physics (including surface physics)
https://www.epj-conferences.org/articles/epjconf/abs/2018/15/epjconf_efm2018_02107/epjconf_efm2018_02107.html

Nozzles are devices generating jets. They are widely used in fluidics and also in active control of flows past bodies. Being practically always a component of larger system, design and optimisation of the system needs characterisation of nozzle properties by an invariant quantity. Perhaps surprisingly, no suitable invariant has been so far introduced. This article surveys approaches to characterisation quantities and presents several examples of their typical use in systems such as parallel operation of two nozzles, matching a nozzle to its fluid supply source, apparent resistance increase in flows with pulsation, and the secondary invariants of a family of quasi-similar nozzles.
Permanent Link: http://hdl.handle.net/11104/0279624