Počet záznamů: 1
Axisymmetric nozzles with chamfered contraction
- 1. 0477171 - UT-L 2018 RIV CH eng J - Článek v odborném periodiku
Axisymmetric nozzles with chamfered contraction.
Sensors and Actuators A - Physical. Roč. 263, August (2017), s. 147-158. ISSN 0924-4247
Institucionální podpora: RVO:61388998
Klíčová slova: nozzles * chamfering * invariant
Kód oboru RIV: BK - Mechanika tekutin
Obor OECD: Fluids and plasma physics (including surface physics)
Impakt faktor: 2.311, rok: 2017
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.
Trvalý link: http://hdl.handle.net/11104/0273618