EXPERIMENTAL STUDY OF THE LEIDENFROST EFFECT IN THE CONTEXT OF HIGH HEAT FLUX COOLING

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

čeština

Název v původním jazyce

EXPERIMENTAL STUDY OF THE LEIDENFROST EFFECT IN THE CONTEXT OF HIGH HEAT FLUX COOLING

Popis výsledku v původním jazyce

The behavior of water droplet on heated surfaces is experimentally observed to investigate the properties of the insulating vapor layer, a key element of the boiling crisis phenomenon. The lifetime of droplets on the heated surface is measured and compared with analytical models to examine the formation of the insulating vapor layer thickness between the coolant and the heated wall. The potential for reducing the Leidenfrost effect and increasing the critical heat flux by adjusting the surface roughness is examined to improve the thermohydraulic properties of the first-wall cooling channels. The behavior of water droplets on the heated surface with variable roughness is observed through the acoustic emission method. The behavior of water droplets on heated copper surfaces was experimentally studied using inductive and electrical heating with thermocouple temperature control, camera recording and acoustic emission analysis. The measured droplet lifetimes were compared with analytical models to evaluate the insulating vapor layer thickness. The practical relevance lies in reducing the Leidenfrost effect and increasing the critical heat flux, which can improve the cooling performance of high heat flux components such as tokamak first-wall channels.

Název v anglickém jazyce

EXPERIMENTAL STUDY OF THE LEIDENFROST EFFECT IN THE CONTEXT OF HIGH HEAT FLUX COOLING

Popis výsledku anglicky

The behavior of water droplet on heated surfaces is experimentally observed to investigate the properties of the insulating vapor layer, a key element of the boiling crisis phenomenon. The lifetime of droplets on the heated surface is measured and compared with analytical models to examine the formation of the insulating vapor layer thickness between the coolant and the heated wall. The potential for reducing the Leidenfrost effect and increasing the critical heat flux by adjusting the surface roughness is examined to improve the thermohydraulic properties of the first-wall cooling channels. The behavior of water droplets on the heated surface with variable roughness is observed through the acoustic emission method. The behavior of water droplets on heated copper surfaces was experimentally studied using inductive and electrical heating with thermocouple temperature control, camera recording and acoustic emission analysis. The measured droplet lifetimes were compared with analytical models to evaluate the insulating vapor layer thickness. The practical relevance lies in reducing the Leidenfrost effect and increasing the critical heat flux, which can improve the cooling performance of high heat flux components such as tokamak first-wall channels.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20305 - Nuclear related engineering; (nuclear physics to be 1.3);

Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název statě ve sborníku

Šimáně 2025 – International Conference on Nuclear Engineering

ISBN

978-80-01-07515-9

ISSN

2336-5382

e-ISSN

2336-5382

Počet stran výsledku

8

Strana od-do

63-70

Název nakladatele

Faculty of Nuclear Sciences and Physical Engineering (Czech Technical Univ.)

Místo vydání

Praha

Místo konání akce

Praha

Datum konání akce

17. 6. 2025

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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