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passages in the radially adjacent layers of gas passages, said lon'g sidewalls being more than three times as long as the circumferential spacing therebetween and the latter spacing being not more than a few hundredths of an inch. 2. In the combination according to claim 1, said matrix comprisingapluralityofradiallyspacedcircumferentially extending layers of convoluted thin sheet stock and a spacing layer of circumferentially extending thin sheet stock spacing the radially adjacent layers of convoluted stock, the convolutions of each layer of said convoluted sheet stock comprising said long sidewalls spaced circum‘ ferentially by short end portions of said convolutions, each of the opposite ends of each long sidewall being joined to the end of one of each of the circumferentially next adjacent long sidewalls by one of said short end por tions extending generally circumferentially, said ends and endportionsbeingsecuredtothejuxtaposedspacinglayer of ?at stock spacing said ends radially from the ends of the next radially adjacent layer of said convoluted sheet stock to comprise said rigid beams. 8 long sides being separated by not more than a few hun dredths of an inch and being suf?ciently closely spaced circumferentially to extend substantially parallel to each other, such that said radially adjacent long sides con nected by said rigid beams de?ne force carrying radial spokes extending from ‘the axial region of said matrix to its outer peripheral region. 5. In the combination according to claim 4, said long sides being su?iciently closely spaced circumferentially to comprise the sole radially extending structure car rying the radial forces in said matrix. 6. In a rotary disc-type counter ?ow regenerator for a gas turbine engine, a matrix having radially spaced end faces and comprising two side-by-side layers of thin sheet material wound spirally around the axis of rotation and extending axially the length of said regenerator between said end~faces, one of said layers being convoluted in the direction of the winding and spacing consecutive wind ings of the other layer, the radial and circumferential extent of each convolution in the several radially outer most spirals of the convoluted layer being approximately equal and the crests thereof being brazed to said other layer, said other layer extending circumferentially for sev eral spirals beyond the radially outermost terminal of said convoluted layer to complete a rim for said regen erator, the remaining convolutions of said convoluted layer comprising generally radially extending long sides spaced by circumferentially extending short end portions adjacent said other layer, each of the opposite ends of each gas passage being at least three times as long as the circumferential dimension. 4. In a rotary disc-type counter ?ow regenerator for a gas turbine engine, a matrix having axially spaced end faces and comprising two side-by~side layers of thin sheet material wound spirally around the axis of rotation and extending axially the length of said regenerator between said end faces, one of said layers being convoluted in the direction of the windingand spacing consecutive windings ing parallel to said axis and arranged side-by-side in lay ers extending circumferentially around said axis, said gas passages in cross section transverse to said axis being elongated radially and being de?ned in part by substan tialyparallelcircumferentiallyspacedradiallyextending long thin sidewalls, and means having a radial dimension of the order of magnitude of the thickness of said long thin sidewalls and rigidly connecting the ends of radially 3,276,515 3. In a rotary disc-type counter flow regenerator for a gas turbine engine, a matrix having axially spaced end faces and comprising two side-by-side layers of thin sheet material wound spirally around the axis of rotation and extending axially the length of said regenerator between said end faces, one of said layers being convoluted in the direction of the winding and spacing consecutive windings of the other layer, the convolutions of said convoluted layercomprisinggenerallyradiallyextendinglongsides30 eachlongsidebeingjoinedtooneofeachoftheends spaced by circumferentially extending short end portions adjacent said other layer, each of the opposite ends of each long side being joined to one of each of the ends of the circumferentially next adjacent long side by one of said short end portions, means comprising said short end portions of radially adjacent convolutions brazed to opposite sides of said other layer to comprise rigid beams triple the thickness of said sheet material connecting the radially adjacent long sides of said passages for transmit ting the radial forces in the long sides of each spiral to 40 elongated transverse section, said long sides being more the next radially adjacent long sides in juxtaposed spirals and to complete a plurality of gas ?ow passages of ra dially elongated transverse section, the circumferentially adjacent long sides being spaced by not more than a few hundredths of an inch and being su?iciently closely spaced circumferentially to extend substantially parallel to each other, such that said radially adjacent long sides connected by said rigid beams de?ne force carrying radial spokes extending from the axial region of said matrix to its outer peripheral region, the radial dimension of 50 tral axis ‘and de?ning a plurality of gas passages extend adjacent long sidewalls for transmitting the radial forces of the other layer, the convolutions of said convoluted 60 in the long sidewalls of each layer of gas passages to the layer comprising generally radially extending long sides spaced by circumferentially extending short end portions adjacent said other layer, each of the opposite ends of each long side being joined to one of each of the ends of long sidewalls of the gas passages in the radially adjacent layers of said gas passages and cooperating with said long sidewalls and connecting the circumferentially adjacent ends thereof to completely de?ne said gas passages, the ‘the circumferentially next adjacent long side by one of said short end portions, means comprising said short 65 circumferential spacing between circumferentially adja end portions of radially adjacent convolutions secured in overlapping reinforcing relationship to opposite sides of said other layer to comprise rigid beams connecting the radially adjacent long sides of said passages to transmit 70 tially parallel to each other and such that said radially the radial forces in the long sides in juxtaposed spirals and to complete a plurality of gas flow passages of radially elongated transverse section, the radial dimension of each gas passage being at least three times longer than its cir cllmf?r?ntial dimension, the circumferentially adjacent adjacent long sidewalls connected by said beams de?ne force carrying spokes extending substantially radially from the axial region to the outer peripheral region of said matrix, the radial dimension of each gas passage being at least three times as long as the circumferential of the circumferentially next adjacent long side by one of said short end portions, means comprising said short end portions of radially adjacent convolutions brazed to opposite sides of said other layer in overlapping reinforc ing relationship to comprise rigid beams connecting the radially adjacent long sides of said passages to transmit the radial forces in the long sides of each spiral to the next radially adjacent long sides in juxtaposed spirals, and to complete a plurality of gas flow passages of radially than three times longer than said short end portions, the circumferentially adjacent long sides being suf?ciently closely spaced circumferentially to extend substantially parallel to each other, such that said radially adjacent long sides connected by said rigid beams de?ne force car rying radial spokes extending from the axial region of said matrix to its outer peripheral region. 7. In a disc-type counter?ow regenerator for a gas turbine engine, a disc-type matrix rotatable about a cen cent long sidewalls in radially adjacent layers being of the same order of magnitude and sufficiently small that said circumferentially adjacent long sidewalls are substanPDF Image | WHITFIELD GAS TURBINE REGENERATOR
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