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Regenerator screen disc: Ø47.5, 100 mesh × 0.10 mm wire

Name: Regenerator screen disc: Ø47.5, 100 mesh × 0.10 mm wire dimension sheet
Creator: Xem Studio
License: https://creativecommons.org/licenses/by/4.0/

What screen should a 2 inch thermoacoustic regenerator use? · Hardware · basis: Woven-screen geometry from Swift (porosity 1 − π m d / 4, hydraulic radius φ d / 4(1 − φ)); friction from Swift & Ward

Long Earth Society build part. The regenerator screens in my generator cores. The engines

Exact dimensions. Every file is drawn at true size with no printing tolerance. The holes and pins that meet another part are listed below under Mating features, with the fit each joint needs; open those by your printer's or process's clearance before making the part. Mating features

sizes: 6 in table

Notes

A disc of 100-mesh woven screen with 0.1 mm wire, cut to the 2 in bore (Ø47.5) and drawn as a solid disc 0.2 thick (two wire diameters, the thickness of one woven layer). Stacked, the discs fill the regenerator: 500 per ring-engine core (100 mm), 550 in the twin engine (110 mm).
Porosity 0.69, hydraulic radius 56 µm: about a tenth of the helium's thermal penetration depth at 25 Hz, which is what a traveling-wave regenerator wants (gas and screen at the same temperature, pressure and flow in phase).
No centre hole: nothing passes through these regenerators.
Fit: the disc edge is a slide fit in the bore; a gap at the edge would let gas bypass the screen.

Sizes

feature	value
diameter	Ø47.5
mesh	100 per inch
wire	0.1 mm
layer	0.2 mm
porosity	0.691
hydraulic radius	55.9 µm

Mating features

Drawn at the exact size. Open press, slide, run and socket features by your process's clearance; leave designed gaps and clamp fits as drawn.

feature	exact	mates with	fit	files
disc edge	Ø47.5	2 in spool bore: no bypass at the wall	slide	all
thickness	0.20 (100 mesh × 0.10 wire, one woven layer)	the next disc	designed	all

Where the files are

Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.

G. W. Swift (Acoustical Society of America / LANL)	Thermoacoustics: A Unifying Perspective for Some Engines and Refrigerators (Rott's equations, the energy equation, screen relations; the method behind DeltaEC)	web, book	cited verify
J. Thermophysics and Heat Transfer (G. W. Swift, W. C. Ward)	Simple harmonic analysis of regenerators, 10(4), 652-662 (1996): stacked-screen friction c1(φ) = 1268 − 3545φ + 2544φ²	web	journal article; cited verify
Long Earth Society	Engine builds	web, video	LES site