Screw extruder for solid hydrogen

Authors: Vinyar, I.; Lukin, A.

Source: Technical Physics, Volume 45, Number 1, January 2000 , pp. 106-111(6)

Publisher: MAIK Nauka/Interperiodica

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Abstract:

The first screw extruder capable of continuously forming macroscopic solid hydrogen particles to be injected into the plasma of thermonuclear devices was created and successfully tested. A model of nonisothermal hydrogen flow in the screw channel was developed and used to calculate the extruder efficiency as a function of the system parameters. The results of calculations and experimental data are presented for the extrusion of 500 cm³ of solid hydrogen using an extruder with a working volume of 8 cm³ operating at a rate of 63 mm³/s. Temperature dependences of the viscosity and shear strength of solid hydrogen were studied in the temperature interval from 10 to 13 K, where solid hydrogen behaves like a Bingham fluid.

Document Type: Research article

DOI: http://dx.doi.org/10.1134/1.1259579

Publication date: 2000-01-01