Pressure on the conical surface of needle valves

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F14%3A00432306" target="_blank" >RIV/61388998:_____/14:00432306 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.sna.2014.09.013" target="_blank" >http://dx.doi.org/10.1016/j.sna.2014.09.013</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.sna.2014.09.013" target="_blank" >10.1016/j.sna.2014.09.013</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Pressure on the conical surface of needle valves

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Pressure on the conical surface of needle valves

Popis výsledku anglicky

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.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BK - Mechanika tekutin

OECD FORD obor

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Projekt

<a href="/cs/project/GA13-23046S" target="_blank" >GA13-23046S: FLUIDICKÉ OSCILÁTORY PRO PĚSTOVÁNÍ ŘAS</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2014

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Sensors and Actuators A - Physical

ISSN

0924-4247

e-ISSN

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Svazek periodika

220

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

12

Strana od-do

1-12

Kód UT WoS článku

000346546800001

EID výsledku v databázi Scopus

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