Experimental investigation of unsteady thermal processes on a pre-cooled concrete circular cylinder in the wind up to Re = 110,000

0428981 - ÚTAM 2015 RIV SK eng C - Konferenční příspěvek (zahraniční konf.)
Král, Radomil - Hračov, Stanislav
Experimental investigation of unsteady thermal processes on a pre-cooled concrete circular cylinder in the wind up to Re = 110,000.
Dynamics of civil engineering and transport structures and wind engineering DYN-WIND'2014. Žilina: EDIS publishing house University of Zilina, 2014 - (Melcer, J.), s. 114-121. ISBN 978-80-554-0844-6.
[Dynamics of Civil Engineering and Transport Structures and Wind Engineering DYN-WIND'2014 /6./. Donovaly (SK), 26.05.2014-29.05.2014]
Grant CEP: GA ČR(CZ) GBP105/12/G059; GA MŠMT(CZ) ED1.1.00/02.0060
Institucionální podpora: RVO:68378297
Klíčová slova: unsteady thermal processes * wind-tunnel testing * heat transfer
Kód oboru RIV: JN - Stavebnictví
http://www.itam.cas.cz/?pid=5

The paper demonstrates a simple and reliable method to determine the unsteady thermal transfer phenomenon on elements of porous materials using a pre-cooled circular cylinder in the cross-flow. Based upon the wind-tunnel testing in the smooth air with the constant temperature, thermal processes are measured using embedded thermal probes and multi-point surface radiometry. It forms a basis for an estimation of the temporal evolution of the temperature distributions that result in the determination of the total heat energy transferred to the cylinder. The overall heat transfer coefficient is evaluated at different temporal stages of the testing while respecting material imperfections of the considered element.
Trvalý link: http://hdl.handle.net/11104/0234196