Abstract
It has been found experimentally that there are two distinct flow regions in the flow characteristics of superfluid helium through the porous element of a thermomechanical pump (TMP). 1 One is the ideal flow region and the other is the turbulent one. However, it is not known yet how the flow turns turbulent. The concept of the critical heat input to TMP is introduced in this study to define the transition from the ideal flow region to the superfluid turbulent one. The temperature dependence and the geometrical dependence of the critical heat input are experimentally investigated and the results are discussed in this paper. This critical heat input gives one of the necessary information to design a TMP properly for the given specifications such as the required mass flow rate and the temperature of superfluid helium.
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© 1996 Plenum Press, New York
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Nakai, H., Kimura, N., Murakami, M., Haruyama, T., Yamamoto, A. (1996). Transition to Turbulent State of Superfluid Helium Flow through Thermomechanical Pump Element. In: Kittel, P. (eds) Advances in Cryogenic Engineering. A Cryogenic Engineering Conference Publication, vol 41. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-0373-2_35
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DOI: https://doi.org/10.1007/978-1-4613-0373-2_35
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4613-8022-1
Online ISBN: 978-1-4613-0373-2
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