Baffle assembly for modifying transitional flow effects between different cavities
A baffle assembly and burner including the baffle assembly. The baffle assembly includes a collar having a central axis and an inner circumferential surface. A plurality of vanes are secured to the inner circumferential surface of the collar. Each vane includes a leg extending from the collar at a first angle with respect to the central axis. The first angle of the leg is configured to impart rotation to a flow of fluid through the baffle assembly. An impingement plate extends from the leg at a second angle with respect to the central axis. The second angle is greater than the first angle.
1. A baffle assembly, comprising:
a collar having a central axis and an inner circumferential surface; and,
a plurality of vanes secured to the inner circumferential surface of the collar, each vane comprising:
a leg extending from the collar at a first angle with respect to the central axis, the first angle of the leg configured to impart rotation to a flow of fluid through the baffle assembly; and
an impingement plate extending from the leg at a second angle with respect to the central axis, wherein the second angle is greater than the first angle.
2. The baffle assembly of claim 1 , wherein the second angle is defined as the first angle subtracted from a third angle measured between the leg and the impingement plate.
3. The baffle assembly of claim 1 , wherein the first angle is between 5° and 30°.
4. The baffle assembly of claim 1 , wherein the second angle is between 60° and 120°.
5. The baffle assembly of claim 1 , wherein the impingement plates have a width and a length sufficient to block at least 80% of a flow area through the collar.
6. The baffle assembly of claim 1 , wherein a length of the leg is approximately equal to a diameter of the collar.
7. The baffle assembly of claim 1 , wherein a first length of each impingement plate is equal to between about 25% to 50% of a second length of the leg.
8. The baffle assembly of claim 1 , comprising four of the vanes equally spaced about the inner surface of the collar.
9. The baffle assembly of claim 1 , wherein the collar has a circular cross-sectional shape.
10. A burner assembly having an inlet and the baffle assembly of claim 1 installed in, at, or proximate to the inlet.
11. The burner assembly of claim 10 , wherein the burner assembly is a ribbon burner.
12. The burner assembly of claim 10 , wherein the inlet includes a first inlet and a second inlet positioned at opposite sides of a burner body.