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TT: Fachverband Tiefe Temperaturen
TT 39: Superconducting Electronics
TT 39.11: Talk
Wednesday, March 29, 2023, 18:00–18:15, HSZ 304
Pressure drop measurements and flow simulations of different regenerator fillings in a single stage GM-type pulse tube cryocooler — •Bernd Schmidt1,2, Elias Eisenschmidt1,3, Jack-André Schmidt1,2, Jens Falter1, Hardy Weisweiler3, and André Schirmeisen1,2 — 1TransMIT-Center for Adaptive Cryotechnology and Sensors, Giessen, Germany — 2Institute of Applied Physics, Justus-Liebig-University Giessen, Germany — 3Technische Hochschule Mittelhessen, Friedberg, Germany
Although pulse tube cryocoolers (PTCs) reaching liquid Helium temperature were already presented in the 1990s[1], they are still subject to vivid development in many directions. Much of this development is done with the help of simulations and empirical values. A crucial part of a PTC is the regenerator, which is usually filled with multiple layers of porous materials with high heat capacity. These porous materials come in different shapes, mainly packed spheres and wire meshes.
In this talk we present measurements and simulations of pressure drop and gas flow through different regenerator fillings. We show the differences between the different kinds of fillings from the fluid mechanics point of view.
[1] C. Wang et al., Cryogenics, 37, 159 (1997)