Počet záznamů: 1
Pressure on the conical surface of needle valves
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SYSNO ASEP 0432306 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Pressure on the conical surface of needle valves Tvůrce(i) Tesař, Václav (UT-L) RID Zdroj.dok. Sensors and Actuators A - Physical. - : Elsevier - ISSN 0924-4247
Roč. 220, č. 1 (2014), s. 1-12Poč.str. 12 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova nozzle ; needle nozzle ; flow separation Vědní obor RIV BK - Mechanika tekutin CEP GA13-23046S GA ČR - Grantová agentura ČR Institucionální podpora UT-L - RVO:61388998 UT WOS 000346546800001 DOI 10.1016/j.sna.2014.09.013 Anotace Author investigated basic geometry of needle valves: conical needle body inserted into the entrance of a sharp-edged cylindrical channel. Investigations of two alternative geometries having 90 and 60 deg included angles were made with scaled-up laboratory model provided with pressure tap holes on the surfaces – together with numerical flowfield computations. Effect of Reynolds number was found generally weak, but variations of the needle lift caused significant variations in the character of the flowfield, with typical three local pressure extremes along the flowpath line. A newly observed phenomenon of flow separation from the surface of the cone near its tip was investigated and a universal expression for pressure distribution was setup based on similarity transformation. 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 2015
Počet záznamů: 1