Investigation of the Flow and Heat Transfer Characteristics and Erosion Law of Particulate in LBE on the Subchannel

IF 1 4区工程技术 Q3 NUCLEAR SCIENCE & TECHNOLOGY

Science and Technology of Nuclear Installations Pub Date : 2022-03-22 DOI:10.1155/2022/2354978

B. Zhu, Qi Xu, Pengxiang Li

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引用次数: 0

Abstract

A triangle subchannel model was established to study the flow and heat transfer characteristics of lead-bismuth eutectic (LBE) alloy and the erosion rate of the core channel by the particulate in LBE. Under different inlet velocities, particle types, particle diameters, and particle concentrations, the erosion law of the channel wall in LEB was investigated by using a discrete phase model (DPM). The results of this study showed that with the increase of inlet velocity, the outlet temperature of the LEB decreases and the heat transfer capacity was strengthened. The increase of inlet velocity will lead to the increase of erosion rate on the wall, and the change is exponential. The erosion rate of particulate in the low concentration is small but cannot be ignored; with increasing concentration of particulates, the erosion of the wall by particulates becomes serious. The effect of particulate density on the wall erosion rate can be ignored. The effect of changing the particle size on the erosion rate is more significant when the particle size is small, and at the same time, the erosion rate of the particles on the wall increases with the increase of the particle size.

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子通道LBE中颗粒流动传热特性及侵蚀规律的研究

建立了一个三角形子通道模型，研究了铅铋共晶（LBE）合金的流动和传热特性以及LBE中颗粒对芯通道的侵蚀速率。采用离散相模型（DPM）研究了在不同入口速度、颗粒类型、颗粒直径和颗粒浓度下LEB通道壁的侵蚀规律。研究结果表明，随着入口速度的增加，LEB的出口温度降低，传热能力增强。入口速度的增加会导致壁面侵蚀率的增加，并且这种变化是指数型的。颗粒物在低浓度下的侵蚀速率较小，但不可忽视；随着颗粒物浓度的增加，颗粒物对壁面的侵蚀也越来越严重。颗粒密度对壁面侵蚀率的影响可以忽略不计。当颗粒尺寸较小时，改变颗粒尺寸对侵蚀速率的影响更为显著，同时颗粒对壁面的侵蚀速率随着颗粒尺寸的增加而增加。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Science and Technology of Nuclear Installations NUCLEAR SCIENCE & TECHNOLOGY-

CiteScore

2.30

自引率

9.10%

发文量

审稿时长

4-8 weeks

期刊介绍： Science and Technology of Nuclear Installations is an international scientific journal that aims to make available knowledge on issues related to the nuclear industry and to promote development in the area of nuclear sciences and technologies. The endeavor associated with the establishment and the growth of the journal is expected to lend support to the renaissance of nuclear technology in the world and especially in those countries where nuclear programs have not yet been developed.