Počet záznamů: 1
An experimental investigation of unsteady thermal processes on a pre-cooled circular cylinder of porous material in the wind
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SYSNO ASEP 0429256 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název An experimental investigation of unsteady thermal processes on a pre-cooled circular cylinder of porous material in the wind Tvůrce(i) Král, Radomil (UTAM-F) RID, SAI Celkový počet autorů 1 Zdroj.dok. International Journal of Heat and Mass Transfer. - : Elsevier - ISSN 0017-9310
Roč. 77, October (2014), s. 906-914Poč.str. 9 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova circular cylinder ; unsteady heat transfer ; temperature distribution ; wind tunnel experiment ; porous material Vědní obor RIV JN - Stavebnictví CEP ED1.1.00/02.0060 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy GBP105/12/G059 GA ČR - Grantová agentura ČR Institucionální podpora UTAM-F - RVO:68378297 UT WOS 000340302400082 EID SCOPUS 84903851795 DOI 10.1016/j.ijheatmasstransfer.2014.06.045 Anotace This paper presents a simple and reliable method for determining the phenomenon of unsteady thermal transfer mainly for elements of porous materials. The method is demonstrated on a concrete circular cylinder subjected to air cross-flow at a constant temperature. Based on the technique of specific volume heat capacity of the system, thermal processes for various Reynolds numbers up to Re = 111,000 are monitored and measured using embedded thermal probes and multi-point surface thermometry. By identifying the fitting approximation functions over the measurement points, the time evolutions of the temperature distribution over the cross-section are estimated, which form the basis for determining the total heat energy transferred from the free-stream to the cylinder. The overall heat transfer coefficient is evaluated at various temporal stages of the testing. The paper also shows transient conductive processes in the cylinder arising due to the forced heat transfer at various flow velocities. Pracoviště Ústav teoretické a aplikované mechaniky Kontakt Kulawiecová Kateřina, kulawiecova@itam.cas.cz, Tel.: 225 443 285 Rok sběru 2015 Elektronická adresa http://www.sciencedirect.com/science/article/pii/S0017931014005171
Počet záznamů: 1