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http://dx.doi.org/10.9714/psac.2022.24.3.068

Study of thermoacoustic oscillations in half-open tubes for saturated superfluid helium  

Wang, Xianjin (College of Petrochemical Engineering, Lanzhou University of Technology)
Niu, Xiaofei (Institute of Modern Physics, Chinese Academy of Sciences)
Bai, Feng (Institute of Modern Physics, Chinese Academy of Sciences)
Zhang, Junhui (Institute of Modern Physics, Chinese Academy of Sciences)
Chen, Shuping (College of Petrochemical Engineering, Lanzhou University of Technology)
Publication Information
Progress in Superconductivity and Cryogenics / v.24, no.3, 2022 , pp. 68-73 More about this Journal
Abstract
Thermoacoustic oscillations (TAOs) are spontaneous pressure oscillations frequently seen in hydrogen or helium cryogenic systems. Half-open tubes connected to cryogenic fluid with a closed room temperature end have a high potential for oscillation generation. Thermoacoustic oscillations will result in significant pressure fluctuations and additional heat load, endangering the security and stability of the cryogenic system. The goal of this paper is to investigate TAOs in superfluid helium using both theoretical and experimental methods. Five half-open tubes with varied typical inner diameters inserted into superfluid helium were installed in a test cryostat. The onset characteristics of thermoacoustic oscillations were presented and studied. The effect of temperature profile was discussed. Finally, a simple eliminating method was introduced.
Keywords
cryogenic system; thermoacoustic oscillations; saturated superfluid helium; onset characteristics;
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