CFD Simulation of thermoacoustic oscillations in liquid helium cryogenic system

被引：0

作者：

Wang, Xianjin ^{[1
]}

Niu, Xiaofei ^{[2
]}

Bai, Feng ^{[2
]}

Zhang, Junhui ^{[2
]}

Chen, Shuping ^{[1
]}

机构：

[1] Lanzhou Univ Technol, Coll Petrochem Engn, Lanzhou, Peoples R China

[2] Chinese Acad Sci, Inst Modern Phys, Beijing, Peoples R China

来源：

PROGRESS IN SUPERCONDUCTIVITY AND CRYOGENICS | 2021年 / 23卷 / 01期

关键词：

thermoacoustic oscillations; CFD simulation; onset characteristics; DRIVEN ACOUSTIC-OSCILLATIONS;

D O I：

10.9714/psac.2021.23.1.001

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Thermoacoustic oscillations (TAOs) could be often observed in liquid helium cryogenic system especially in half-open tubes. These tubes have closed warm end (300K) and open cold end (usually 4.4K). This phenomenon significantly induces additional heat load to cryogenic system and other undesirable effects. This work focuses on using computational fluid dynamics (CFD) method to study TAOs in liquid helium. The calculated physical model, numerical scheme and algorithm, and wall boundary conditions were introduced. The simulation results of onset process of thermoacoustic oscillations were presented and analyzed. In addition, other important characteristics including phase relation and frequency were studied. Moreover, comparisons between experiments and the CFD simulations were made, which demonstrated thevalidity of CFD simulation. CFD simulation can give us a better understanding of onset mechanism of TAOs and nonlinear characteristics in liquid helium cryogenic system.

引用

页码：1 / 6

页数：6

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