Publicou 4 edições por ano
ISSN Imprimir: 2151-7975
ISSN On-line: 2151-7991
VISUALISATION OF FLOW PATTERNS IN FLAT PLATE PULSATING HEAT PIPE: INFLUENCE OF HYDRAULIC BEHAVIOUR ON THERMAL PERFORMANCES
RESUMO
In this experimental study, a specific flat plate pulsating heat pipe (FPPHP) with ethanol as working fluid has been tested. The experimental test bench consists of a copper block at the surface of which a single 10 turns groove has been machined. A transparent glass pressed in front of the top surface and two high speed cameras allow the fluid flow patterns to be visualized during the operations. Thus, the analysis of the synchronized recorded images permits to link the hydraulic behavior of the fluid inside the PHP to its thermal response as regards operating conditions (heat power applied, cooling temperature, inclination). Quantitative and qualitative analysis of the results show that in vertical position the flow pattern are almost always annular whatever the heat power applied, with liquid storage in some adjacent channels; in horizontal position, the evaporator is progressively dried out with some oscillations for specific heat powers. Lastly, by putting the PHP in an original orientation with the gravity, named edge orientation, the fluid motion is transmitted from one-branch-to-another sequence, induced by the pressure difference increased by the gravity forces between channels.
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Ayel Vincent, Slobodeniuk Maksym, Bertossi Rémi, Karmakar Abhishek, Martineau Flavien, Romestant Cyril, Bertin Yves, Khandekar Sameer, Thermal performances of a flat-plate pulsating heat pipe tested with water, aqueous mixtures and surfactants, International Journal of Thermal Sciences, 178, 2022. Crossref
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Ayel Vincent, Slobodeniuk Maksym, Bertossi Rémi, Romestant Cyril, Bertin Yves, Flat plate pulsating heat pipes: A review on the thermohydraulic principles, thermal performances and open issues, Applied Thermal Engineering, 197, 2021. Crossref
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Slobodeniuk Maksym, Bertossi Remi, Ayel Vincent, Ravichandran Rajalakshmi, Thyagarajan Karthik, Romestant Cyril, Bertin Yves, Experimental study of the flat plate pulsating heat pipe operation during dry-out and flow re-activation periods under microgravity conditions, International Journal of Multiphase Flow, 147, 2022. Crossref