Visualization and heat transfer study of a synthetic jet impinging on a circular cylinder

0460893 - ÚT 2017 RIV ZA eng C - Conference Paper (international conference)
Broučková, Zuzana - Trávníček, Zdeněk
Visualization and heat transfer study of a synthetic jet impinging on a circular cylinder.
12th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics /HEFAT2016/. Pretoria: University of Pretoria: HEFAT, 2016 - (Meyer, J.), s. 1791-1796. ISBN 978-1-77592-124-0.
[International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics /12./ HEFAT 2016. Torremolinos (ES), 11.07.2016-13.07.2016]
R&D Projects: GA ČR GA14-08888S; GA ČR(CZ) GA16-16596S
Institutional support: RVO:61388998
Keywords : synthetic jet * impinging jet * heat transfer
Subject RIV: JU - Aeronautics, Aerodynamics, Aircrafts

Study deals with slot water jet (continuous and synthetic) impinging onto heated cylinder. Slot width, cylinder diameter, dimensionless cylinder-to-nozzle spacing were 0.36 mm, 1.2 mm, 5–21, respectively. Reynolds number ranged 35–170. LIF visualization revealed separation on windward cylinder side for both jets. Flow around leeward cylinder side is absent. It is attributed to effects of mini scale and low Re. Heat transfer experiments were validated in natural convection regime. Enhancement of average Nusselt numbers (4.2–6.2 times) by means of synthetic jets was quantified. Correlation for average Nu was proposed for both jets.
Permanent Link: http://hdl.handle.net/11104/0261313