Influence of the impact angle and pressure on the spray cooling of vertically moving hot steel surfaces

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F15%3APU114010" target="_blank" >RIV/00216305:26210/15:PU114010 - isvavai.cz</a>

Výsledek na webu

<a href="http://mit.imt.si/Revija/" target="_blank" >http://mit.imt.si/Revija/</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.17222/mit.2013.239" target="_blank" >10.17222/mit.2013.239</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Influence of the impact angle and pressure on the spray cooling of vertically moving hot steel surfaces

Popis výsledku v původním jazyce

The cooling of vertically moving strips is used very often to obtain the required material properties. Water spray cooling has to be used when a high cooling intensity is needed. Our Heat Transfer and Fluid Flow Laboratory is equipped with a testing device which allows vertical movement of a heated experimental plate (sheet). Two different sizes of flat-jet nozzles were tested with different water pressures and angles of the water impact (inclination angles of the spraying bar). The water-pressure range was between 2 bar and 9.3 bar and the angle of the water impact changed from 20 deg to 40 deg. The dependence of the heat-transfer coefficient on the surface temperature was evaluated for each experiment. Interesting results were obtained from the comparison of these experimental results, showing that the heat-transfer coefficient and the Leidenfrost temperature increase with the increasing water pressure. Very interesting results were obtained during the tests with different inclination angles. The highest heat-transfer coefficient was obtained for the angle of 20 deg and the lowest value of the heat-transfer coefficient was obtained for the angle of 40 deg at the surface temperatures of around 200 degrese of Celsius.

Název v anglickém jazyce

Influence of the impact angle and pressure on the spray cooling of vertically moving hot steel surfaces

Popis výsledku anglicky

The cooling of vertically moving strips is used very often to obtain the required material properties. Water spray cooling has to be used when a high cooling intensity is needed. Our Heat Transfer and Fluid Flow Laboratory is equipped with a testing device which allows vertical movement of a heated experimental plate (sheet). Two different sizes of flat-jet nozzles were tested with different water pressures and angles of the water impact (inclination angles of the spraying bar). The water-pressure range was between 2 bar and 9.3 bar and the angle of the water impact changed from 20 deg to 40 deg. The dependence of the heat-transfer coefficient on the surface temperature was evaluated for each experiment. Interesting results were obtained from the comparison of these experimental results, showing that the heat-transfer coefficient and the Leidenfrost temperature increase with the increasing water pressure. Very interesting results were obtained during the tests with different inclination angles. The highest heat-transfer coefficient was obtained for the angle of 20 deg and the lowest value of the heat-transfer coefficient was obtained for the angle of 40 deg at the surface temperatures of around 200 degrese of Celsius.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20303 - Thermodynamics

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název periodika

Materiali in tehnologije

ISSN

1580-2949

e-ISSN

1580-3414

Svazek periodika

49

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

SI - Slovinská republika

Počet stran výsledku

4

Strana od-do

333-336

Kód UT WoS článku

000354018700003

EID výsledku v databázi Scopus

2-s2.0-84929725265