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TT: Fachverband Tiefe Temperaturen

TT 60: Cryogenic Detectors and Sensors, Refrigeration and Thermometry

TT 60.6: Talk

Wednesday, March 20, 2024, 17:15–17:30, H 3025

Experimental investigations and numerical simulations of the pressure drop in different regenerator fillings of a single stage GM-type pulse tube cooler — •Elias Eisenschmidt^1,3, Jack-Andre Schmidt^2,3, Bernd Schmidt^2,3, Jens Falter³, and Andre Schirmeisen^2,3 — ¹Technische Hochschule Mittelhessen, Giessen, Germany — ²Justus-Liebig-University, Giessen, Germany — ³TransMIT-Center for Adaptive Cryotechnology and Sensors, Giessen, Germany

In this talk, numerical flow simulations and measurements of a single stage pulse tube cryocooler (PTS 8030, TransMIT GmbH) will be discussed. The goal of the investigation is to get a closer look at the pressure drop of different regenerator fillings. The numerical simulations in particular allow a deeper understanding of the flow pattern inside the different regenerator-fillings. [1, 2]

The results of the experiments can for example be used to build a holistic numerical simulation. Similar simulations were already performed, but in most papers, pressure and mass flow were assumed to be sinusoidal. With the conducted pressure measurements, it is possible to perform simulations using the experimental pressure wave as the inlet condition.

[1] L.M.Qiu, Y.L.He, Z.H.Gan, X.B.Zhang, G.B.Chen, Cryogenics 47 (2007) 49

[2] P. P. Steijaert, Thermodynamical aspects of pulse-tube refrigerators, Technische Universiteit Eindhoven, 1999