Numerical investigation of influence of overheating of molten aluminum and heat transfer in continuous combined casting and pressing
Скачать файл:
URI (для ссылок/цитирований):
https://link.springer.com/article/10.3103/S1067821219030143https://elib.sfu-kras.ru/handle/2311/129409
Автор:
Скуратов, А. П.
Потапенко, А. С.
Горохов, Ю. В.
Попиякова, Н. П.
Коллективный автор:
Политехнический институт
Кафедра теплотехники и гидрогазодинамики
Дата:
2019-05Журнал:
Russian Journal of Non-Ferrous MetalsКвартиль журнала в Scopus:
Q2Квартиль журнала в Web of Science:
Q4Библиографическое описание:
Скуратов, А. П. Numerical investigation of influence of overheating of molten aluminum and heat transfer in continuous combined casting and pressing [Текст] / А. П. Скуратов, А. С. Потапенко, Ю. В. Горохов, Н. П. Попиякова // Russian Journal of Non-Ferrous Metals. — 2019. — Т. 60 (№ 3). — С. 225-231Текст статьи не публикуется в открытом доступе в соответствии с политикой журнала.
Аннотация:
The results of a numerical investigation into the temperature–temporal dependences in continuous
combined casting and pressing of the AK12 experimental aluminum alloy at a different overheating temperature
from startup to the instant the steady-state thermal conditions are reached by the installation are
reported. Calculations are performed based on a three-dimensional computer model of a complex heat
exchange in an installation of a new design equipped by a horizontal rotary crystallizer. Theoretical investigations
into the effect of overheating of the poured aluminum melt on the temperature-dependent heat
exchange processes are performed. The influence of the character of the heat exchange in the transient thermal
mode on the temperature field of the solidified melt for its different remoteness from the pouring point
is determined. It is shown that the asymmetry of the temperature field in the control metal cross section near
the pressing tool with the maximal temperature to the contacting crystallizer surface increases during crystallizer
heating in the transient process. It is established that the duration of the transient process during the
installation startup from the cold state until the steady-state thermal mode is attained depends on the temperature
of the melt being poured. The maximal limit of overheating of the poured metal is determined, above
which, when implementing the continuous combined casting–pressing technology, the aluminum melt does
not solidify in the crystallizer and forced cooling of installation elements should be organized. The influence
of melt overheating on the character of the temperature field along the crystallizer cross section is evaluated
for the entire period of the transient thermal process. The design measures ensuring the rational temperature
working conditions of bearings during the installation operation are given.