Abstract
The straightener of pulse tube refrigerator (PTR) can change gas flow distribution in the tube and improve performance of PTR .In this paper numerical simulation is used to study and optimize the property parameters of straightener with helium as work fluid. The straightener is treated as porous media. The key parameter fk. is defined as the ratio of streamwise and transverse permeabilities. The smallest length of straightener is optimized by changing the value of fk. The result shows that straightener can change gas flow distribution in tube and improve performance of PTR. fk. is bigger, the length of straightener is shorter and streamwise pressure drop is smaller.
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