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US 11,774,194 B2Granted
Thermoacoustic 3D printed stack and heat exchanger
AssigneeThe Government of the United States of America, as represented by the Secretary of Homeland Security
InventorsBryson C. Jacobs, Patrick T. Irwin
Life of this patent
Estimating the term…
Abstract
A thermoacoustic stack includes an outer wall which is cylindrical and has a length extending between a first end and a second end. An internal wall structure is disposed inside the outer wall. The internal wall structure includes a plurality of spaced adjacent wall surfaces extending along the length of the outer wall to provide open flow passages between the spaced adjacent wall surfaces. A first cross member extends across the outer wall at the first end and is connected to the outer wall and the internal wall structure at the first end.
Claims28
A thermoacoustic stack comprising:
- an outer wall which is cylindrical and has a length extending between a first end and a second end;
- an internal wall structure disposed inside the outer wall, the internal wall structure including a plurality of spaced adjacent wall surfaces extending along the length of the outer wall to provide open flow passages between the spaced adjacent wall surfaces;
- a first cross member extending across the outer wall at the first end and connected to the outer wall and the internal wall structure at the first end;
- and
- a second cross member extending across the outer wall at the second end and connected to the outer wall and the internal wall structure at the second end;
- the second cross member being circumferentially spaced from the first cross member by a circumferential angle;
- the circumferential angle being about 90 degrees.
4 more elements
A thermoacoustic stack comprising:
- an outer wall which is cylindrical and has a length extending between a first end and a second end;
- an internal wall structure disposed inside the outer wall, the internal wall structure including a plurality of spaced adjacent wall surfaces extending along the length of the outer wall to provide open flow passages between the spaced adjacent wall surfaces;
- a first cross member extending across the outer wall at the first end and connected to the outer wall and the internal wall structure at the first end;
- and
- a second cross member extending across the outer wall at the second end and connected to the outer wall and the internal wall structure at the second end;
- the second cross member being circumferentially spaced from the first cross member by a circumferential angle;
- the internal wall structure comprising a spiral wall having an outer edge connected to an interior surface of the outer wall and an inner edge spiraling circumferentially outward to the outer edge, the spiral wall including the adjacent wall surfaces which are spaced to provide the open flow passages therebetween extending between the first end and the second end;
- and
- the spaced adjacent wall surfaces being substantially uniformly spaced by a space of about 2 to 4 thermal penetration depths of the thermoacoustic stack.
6 more elements
A thermoacoustic stack comprising:
- an outer wall which is cylindrical and has a length extending between a first end and a second end;
- an internal wall structure disposed inside the outer wall, the internal wall structure including a plurality of spaced adjacent wall surfaces extending along the length of the outer wall to provide open flow passages between the spaced adjacent wall surfaces;
- a first cross member extending across the outer wall at the first end and connected to the outer wall and the internal wall structure at the first end;
- and
- a second cross member extending across the outer wall at the second end and connected to the outer wall and the internal wall structure at the second end;
- the second cross member being circumferentially spaced from the first cross member by a circumferential angle;
- the spaced adjacent wall surfaces being substantially uniformly spaced by a space of about 2 to 4 thermal penetration depths of the thermoacoustic stack.
4 more elements
A thermoacoustic stack comprising:
- an outer wall which is cylindrical and has a length extending between a first end and a second end;
- an internal wall structure disposed inside the outer wall, the internal wall structure including a spiral wall having an outer edge connected to an interior surface of the outer wall and an inner edge spiraling circumferentially outward to the outer edge, the spiral wall including adjacent wall surfaces which are spaced to provide open flow passages therebetween, the adjacent wall surfaces extending along the length of the outer wall to provide the open flow passages;
- a first cross member extending across the outer wall at the first end and connected to the outer wall and the spiral wall at the first end;
- and
- a second cross member extending across the outer wall at the second end and connected to the outer wall and the internal wall structure at the second end;
- the second cross member being circumferentially spaced from the first cross member by a circumferential angle;
- the circumferential angle being about 90 degrees.
4 more elements
A thermoacoustic stack comprising:
- an outer wall which is cylindrical and has a length extending between a first end and a second end;
- an internal wall structure disposed inside the outer wall, the internal wall structure including a spiral wall having an outer edge connected to an interior surface of the outer wall and an inner edge spiraling circumferentially outward to the outer edge, the spiral wall including adjacent wall surfaces which are spaced to provide open flow passages therebetween, the adjacent wall surfaces extending along the length of the outer wall to provide the open flow passages;
- a first cross member extending across the outer wall at the first end and connected to the outer wall and the spiral wall at the first end;
- and
- a second cross member extending across the outer wall at the second end and connected to the outer wall and the internal wall structure at the second end;
- the second cross member being circumferentially spaced from the first cross member by a circumferential angle;
- the spaced adjacent wall surfaces being aligned parallel to the length of the outer wall and are substantially uniformly spaced by a space of about 2 to 4 thermal penetration depths of the thermoacoustic stack.
4 more elements
A thermoacoustic stack comprising:
- an outer wall which is cylindrical and has a length extending between a first end and a second end;
- a spiral wall having an inner edge spiraling circumferentially outward to an outer edge connected to an interior surface of the outer wall, the spiral wall extending parallel to the length of the outer wall between the first end and the second end to provide a spiral-shaped open flow passage between adjacent wall surfaces of the spiral wall;
- a first cross member extending across the outer wall at the first end and connected to the outer wall and the spiral wall at the first end;
- a second cross member extending across the outer wall at the second end and connected to the outer wall and the spiral wall at the second end;
- and
- the second cross member being circumferentially spaced from the first cross member by about 90 degrees.
3 more elements
Dependencies are inferred from the claim text.