|Table of Contents|

Comparison of convective heat transfer characteristics of liquid metals flowing across tube bundles between gravity and zero-gravity conditions(PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2024年04期
Page:
103-109
Research Field:
目次
Publishing date:

Info

Title:
Comparison of convective heat transfer characteristics of liquid metals flowing across tube bundles between gravity and zero-gravity conditions
Author(s):
XIAO Hui1;  GUO Liang1;  LAN Zhike1;  MA Yuan2;  WANG Suhao1;  WANG Sheng1
1.Nuclear Power Institute of China, Chengdu 610213, China; 2.National Key Laboratory ofAerospace Liquid Propulsion, Xi'an Aerospace Propulsion Institute, Xi'an 710100, China
Keywords:
convective heat transfer;  flowing across tube bundles;  liquid metal;  weightlessness;  gravity
PACS:
TL33
DOI:
10.3969/j.issn.1672-9374.2024.04.010
Abstract:
Liquid metal flowing across tube bundles accompanies with strong convective heat transfer ability. Its application is conducive to the miniaturization of heat exchanger equipment and is a good choice for the main heat exchanger design of space reactor. Weightlessness is a typical characteristic of space environment. However, it is not clear in the similarities and differences of the flow and heat transfer characteristics between gravity and zero-gravity conditions in the process of liquid metal flowing across tube bundles, which hinders the development process of liquid metal used in space reactors. Therefore, the turbulent heat transfer characteristics of liquid metal flowing across tube bundles between gravity and zero-gravity conditions are investigated by employing the Reynolds averaged numerical method. The temperature and the velocity distribution are displayed in the local area, and the convective heat transfer characteristics are obtained. It is shown that the convective heat transfer performance is different under gravity and zero-gravity conditions with liquid metal flowing vertically downward. Under the gravity condition, the buoyancy affects the flow and temperature fields, thereby causing a maximum deviation of 10% for friction factor and heat transfer ability compared with the zero-gravity condition.

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