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The Effect of Inlet Pulsations on the Backward-Facing Step Flow
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SYSNO ASEP 0341764 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název The Effect of Inlet Pulsations on the Backward-Facing Step Flow Tvůrce(i) Tihon, Jaroslav (UCHP-M) RID, ORCID, SAI
Pěnkavová, Věra (UCHP-M) RID, ORCID, SAI
Pantzali, M. (GR)Zdroj.dok. European Journal of Mechanics B-Fluids. - : Elsevier - ISSN 0997-7546
Roč. 29, č. 3 (2010), s. 224-235Poč.str. 12 s. Jazyk dok. eng - angličtina Země vyd. FR - Francie Klíč. slova flow separation and reattachment ; backward-facing step ; wall shear stress Vědní obor RIV CI - Průmyslová chemie a chemické inženýrství CEP GA101/04/0745 GA ČR - Grantová agentura ČR GA104/08/0428 GA ČR - Grantová agentura ČR CEZ AV0Z40720504 - UCHP-M (2005-2011) UT WOS 000277554200006 DOI 10.1016/j.euromechflu.2010.02.001. Anotace This experimental study of backward-facing step flow is focused on the transient flow regime (Reh is ranging from 30 to 1800). An unsteady flow pattern with several regions of flow separation downstream the step is investigated in a water channel with the most common expansion geometry (ER=2). The electrodiffusion technique of wall shear rate measurements is applied to recognize the flow structure behind the step. The sliding step configuration enables sufficient mapping of the near-wall flow region even if only two direction-sensitive probes are flush-mounted into the downstream channel walls. The wall shear rate profiles (at bottom and roof) are obtained under steady and pulsatile (frequency up to 3 Hz) flow conditions at the inlet. The inlet flow pulsations affect strongly the overall flow structure behind the step. Up to 80% reduction of the reattachment length is achieved by applying flow pulsations at the most effective frequency. Pracoviště Ústav chemických procesů Kontakt Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Rok sběru 2011
Počet záznamů: 1