Determination of transient heat transfer by cooling channel in high-pressure die casting using inverse method

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F24%3APU151472" target="_blank" >RIV/00216305:26210/24:PU151472 - isvavai.cz</a>

Result on the web

<a href="https://iopscience.iop.org/article/10.1088/1742-6596/2766/1/012197" target="_blank" >https://iopscience.iop.org/article/10.1088/1742-6596/2766/1/012197</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1742-6596/2766/1/012197" target="_blank" >10.1088/1742-6596/2766/1/012197</a>

Result language

angličtina

Original language name

Determination of transient heat transfer by cooling channel in high-pressure die casting using inverse method

Original language description

Complex shapes of aluminum castings are typically manufactured during the short cycle process known as the high-pressure die casting (HPDC). High productivity is ensured by introducing die cooling through a system of channels, die inserts or jet coolers. Die cooling can also effectively help in reducing internal porosity in cast components. Accurate simulations based on sophisticated numerical models require accurate input data such as material properties, initial and boundary conditions. Although the heat is dominantly dissipated through die cooling, indicating the importance of knowing precise thermal boundary conditions, open literature lacks a detailed information about the spatial distribution of heat transfer coefficient. This study presents an inverse method to determine accurate heat transfer coefficients of a die insert based on temperature measurements in multiple points by 0.5 mm K-type thermocouples and a subsequent solution of the two-dimensional inverse heat conduction problem. The solver was built in the open-source CFD code OpenFOAM and the free library for nonlinear optimization NLopt. The results are presented for the commonly used 10 mm die insert with a hemispherical tip and coolant flow rates ranging from 100 l/h to 200 l/h. Heat transfer coefficients reach values well above 50 kW/m2K in the hemispherical tip, which is followed by a secondary peak and then a gradual drop to values around 1 kW/m2K further downstream.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20303 - Thermodynamics

Project

<a href="/en/project/TN02000010" target="_blank" >TN02000010: National Competence Centre of Mechatronics and Smart Technologies for Mechanical Engineering</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2024

Confidentiality

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

Article name in the collection

Journal of Physics: Conference Series , Volume 2766 , 9th European Thermal Sciences Conference (Eurotherm 2024) 10/06/2024 - 13/06/2024 Lake Bled, Slovinsko

ISBN

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ISSN

1742-6588

e-ISSN

1742-6596

Number of pages

6

Pages from-to

1-6

Publisher name

IOP Publishing

Place of publication

neuveden

Event location

Bled

Event date

Jun 10, 2024

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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