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
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
Publication date: 2000-01-01