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research-article

Characteristics of Thermal-Hydraulic and Heat Transfer in Liquid Windowless Target of ADS

[+] Author and Article Information
Feng Wang

Key Laboratory of Low-grade Energy Utilization Technologies and Systems (Chongqing University), Ministry of Education, Chongqing 400044, P.R. China
wangfeng@cqu.edu.cn

Qiang Wen

College of Power Engineering, Chongqing University, Chongqing 400044, P.R. China
20151002041@cqu.edu.cn

Xue Qin

Nuclear Power Design and Research Sub-institute, Chengdu Sichuan, 610041, China
969886547@qq.com

1Corresponding author.

ASME doi:10.1115/1.4039034 History: Received August 28, 2017; Revised January 14, 2018

Abstract

In recent years, the morphological characteristics and stabilization methods of free interface in liquid windowless target become hot research topics in accelerator driven subcritical system (ADS). Based on the structure design of a certain windowless spallation target, CFX program was used to simulate and analyze its free interface character. The method of k-e turbulence model, Cavitation model and VOF method were used to study the flow characteristic of liquid lead-bismuth alloy (LBE) with cavitation phase change and to analyze the free interface morphology characteristics of coolant in the target area. It is concluded that the target region form two stable free interfaces when fluid outlet pressure is in the range of 10000-40000Pa and fluid entrance velocity is in the range of 0.5-1.2m/s. The flow field near the free interface structure is complex. The vortex region appears, and the disorders in the vortex flow pattern leads to fluctuation of the free interface. After establishing stable free interface morphology, the heat transfer characteristics of windowless target was further analyzed.

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