Počet záznamů: 1
Stagnation Point Heat Transfer to an Axisymmetric Impinging Jet at Transition to Turbulence
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SYSNO ASEP 0564650 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Stagnation Point Heat Transfer to an Axisymmetric Impinging Jet at Transition to Turbulence Tvůrce(i) Antošová, Zuzana (UT-L) ORCID, RID
Trávníček, Zdeněk (UT-L) RID, ORCIDCelkový počet autorů 2 Číslo článku 023902 Zdroj.dok. ASME Journal of Heat and Mass Transfer. - : American Society of Mechanical Engineers - ISSN 2832-8450
Roč. 145, č. 2 (2023)Poč.str. 10 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova impinging jet ; heat transfer ; pipe nozzle Obor OECD Thermodynamics CEP GC21-26232J GA ČR - Grantová agentura ČR Způsob publikování Omezený přístup Institucionální podpora UT-L - RVO:61388998 UT WOS 000976830200009 EID SCOPUS 85143977025 DOI https://doi.org/10.1115/1.4055819 Anotace A round air jet issuing from a long straight pipe and impinging perpendicularly onto a heated flat plate was investigated experimentally. The Reynolds number (Re) covered the fully laminar, transitional, and fully turbulent regimes-Re = 850-15,400. The main focus of this investigation was the transition regime, which occurred at Re = 2250-3010. Various measurements were recorded during the experiments using a hot-wire anemometer, an infrared thermometer, and a thermopile heat flux sensor, the mass transfer was measured using the naphthalene sublimation technique. The stagnation point heat transfer was correlated to the laminar and turbulent regimes in the form of the stagnation point Nusselt number, Nu(0) = (CRePr0.4)-Pr-m, where the exponent m = 0.50 and 0.55, respectively. The Nu(0)-Re relationship exhibited nonmonotonic behavior (decrease) in the transition regime. Two counteracting mechanisms occur during transition-jet core shortening and an increase in velocity fluctuation, the former reduces Nu(0), whereas the latter increases it. Pracoviště Ústav termomechaniky Kontakt Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Rok sběru 2024 Elektronická adresa https://asmedigitalcollection.asme.org/heattransfer/article/145/2/023902/1146835/Stagnation-Point-Heat-Transfer-to-an-Axisymmetric
Počet záznamů: 1