Number of the records: 1
Axisymmetric nozzles with chamfered contraction
- 1.
SYSNO ASEP 0477171 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Axisymmetric nozzles with chamfered contraction Author(s) Tesař, Václav (UT-L) RID Number of authors 1 Source Title Sensors and Actuators A - Physical. - : Elsevier - ISSN 0924-4247
Roč. 263, August (2017), s. 147-158Number of pages 12 s. Publication form Print - P Language eng - English Country CH - Switzerland Keywords nozzles ; chamfering ; invariant Subject RIV BK - Fluid Dynamics OECD category Fluids and plasma physics (including surface physics) Institutional support UT-L - RVO:61388998 UT WOS 000409149900015 EID SCOPUS 85020827090 DOI 10.1016/j.sna.2017.05.003 Annotation Paper discusses experimental results obtained in measurements of essentially incompressible flows inaxially symmetric nozzles with inlet entrance shaped as a 45◦ half-angle chamfering. Interest was concentrated on low Reynolds number conditions. Six differently behaving flow regimes, from A to F, were identified. In the regimes B and C, of most importance for engineering applications, the nozzles exhibit lower hydraulic loss than comparable nozzles with smooth, rounded inlet. In the regime C were identified secondary invariants valid for the whole family of nozzles with different lengths. Most probably due to the de-stabilising effect of vortices, shed from the vortex rings formed at the sharpentrance edge made by the chamfering, at increasing Reynolds number the nozzles with chamfered inlet enter quite soon a transition into turbulence. Workplace Institute of Thermomechanics Contact Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Year of Publishing 2018
Number of the records: 1