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Analytical and experimental study on the phase-shifting characteristics of inertance tube of pulse tube cryocoolers working at super high frequencies.

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Title: Analytical and experimental study on the phase-shifting characteristics of inertance tube of pulse tube cryocoolers working at super high frequencies.
Authors: Feng, Tianshi1 (AUTHOR), Li, Geyang1,2 (AUTHOR), Liang, Menglin1 (AUTHOR) liangml@mail.ipc.ac.cn, Gao, Min1,2 (AUTHOR), Tang, Qingjun1 (AUTHOR), Quan, Jia1 (AUTHOR), Chen, Houlei1,2 (AUTHOR), Liang, Jingtao1,2 (AUTHOR)
Source: Cryogenics. Sep2025, Vol. 150, pN.PAG-N.PAG. 1p.
Subjects: Phase modulation, Frequency spectra, Energy density, Flow velocity, Low temperature engineering, Mechanical efficiency, Longitudinal waves
Abstract: • The working mechanism of the phase-shifting in the inertance tube is explained. • Detailed analysis of various factors' impacts on inertance tube's phase characteristics. • Feasibility of inertance tube as phase shifter in super high frequency pulse tube cryocoolers confirmed. Increasing the operating frequency and enhancing the energy density per unit volume constitute a pivotal development direction for pulse tube cryocoolers. The phase angle between the pressure wave and mass flow rate is a crucial parameter for maintaining a high efficiency in pulse tube cryocoolers, and is typically adjusted using a combination of an inertance tube and a reservoir. This paper analyzes the working mechanism of the phase shift in the inertance tube, and explains the effects of parameter changes on the phase shifting through simulations and experiments, focusing on the frequency range of 150 Hz to 250 Hz. This analysis verifies the feasibility of utilizing the combination of inertance tube and reservoir in pulse tube cryocoolers operating at super high frequencies. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:• The working mechanism of the phase-shifting in the inertance tube is explained. • Detailed analysis of various factors' impacts on inertance tube's phase characteristics. • Feasibility of inertance tube as phase shifter in super high frequency pulse tube cryocoolers confirmed. Increasing the operating frequency and enhancing the energy density per unit volume constitute a pivotal development direction for pulse tube cryocoolers. The phase angle between the pressure wave and mass flow rate is a crucial parameter for maintaining a high efficiency in pulse tube cryocoolers, and is typically adjusted using a combination of an inertance tube and a reservoir. This paper analyzes the working mechanism of the phase shift in the inertance tube, and explains the effects of parameter changes on the phase shifting through simulations and experiments, focusing on the frequency range of 150 Hz to 250 Hz. This analysis verifies the feasibility of utilizing the combination of inertance tube and reservoir in pulse tube cryocoolers operating at super high frequencies. [ABSTRACT FROM AUTHOR]
ISSN:00112275
DOI:10.1016/j.cryogenics.2025.104110