Burner assembly
A burner assembly for an oven appliance is provided. The burner assembly includes a gas burner and a flame spreader. The flame spreader defines a slot or a series of apertures that is substantially parallel to the gas burner. The slot or series of apertures can decrease a thickness of a boundary layer positioned adjacent the flame spreader or increase a velocity or a temperature or both of the boundary layer.
1. A burner assembly defining a lateral direction and a transverse direction, the lateral and transverse directions being perpendicular to each other, the burner assembly comprising:
a gas burner that extends between a first end portion and a second end portion along the transverse direction; and
a flame spreader having a heating surface positioned adjacent said gas burner, said flame spreader defining a first slot and a second slot that each extend along the transverse direction substantially parallel to said gas burner, the first and second slots of said flame spreader each defining a width along the lateral direction and a length along the transverse direction, a ratio of the length of the fit slot to the width of the first slot being no less than eight to one, a ratio of the length of the second slot to the width of the second slot being no less than eight to one, said gas burner positioned between the first slot and the second slot along the lateral direction.
2. The burner assembly of claim 1 , wherein said flame spreader also has a back surface positioned opposite the heating surface of said flame spreader, wherein the first and second slots extend through said flame spreader from the heating surface of said flame spreader to the back surface of said flame spreader.
3. The burner assembly of claim 2 , further comprising a deflector mounted to said flame spreader and positioned adjacent the back surface of said flame spreader, said deflector positioned at the first slot of said flame spreader.
4. The burner assembly of claim 3 , wherein the deflector has a cooking surface that is spaced apart from the back surface of said flame spreader by about a distance, the distance being less than about one half of an inch.
5. The burner assembly of claim 3 , wherein the first slot of said flame spreader has an outlet on the back surface of said flame spreader, the outlet of the first slot having an area, wherein the deflector has a cooking surface that faces the back surface of said flame spreader, the cooking surface having an area that is about equal to or larger than the area of the outlet of the first slot.
6. The burner assembly of claim 1 , further comprising a louver positioned adjacent the first slot of said flame spreader, said louver configured for regulating a flow of air through the first slot of said flame spreader.
7. The burner assembly of claim 1 , wherein said gas burner comprises a first portion and a second portion that are spaced apart along at least one of the lateral and transverse directions, wherein the first slot is positioned adjacent the first portion of said gas burner and the second slot is positioned adjacent the second portion of said gas burner.
8. The burner assembly of claim 1 , wherein the heating surface of said flame spreader comprises a first portion and a second portion that define an angle φ therebetween, the angle φ being greater than about five degrees and less than about seventy degrees.
9. The burner assembly of claim 1 , wherein the gas burner defines a plurality of flame ports between the first and second end portions of said gas burner, the first and second slots of said flame spreader extending along the transverse direction such that the first and second slots of said flame spreader are spaced apart from each flame port of the plurality of flame ports along the lateral direction.
10. The burner assembly of claim 1 , wherein the length of the first and second slots is greater than six inches and the width of the first and second slots is greater than a quarter of an inch.
11. The burner assembly of claim 1 , wherein the first and second slots of said flame spreader are spaced apart from said gas burner along the lateral direction such that the slot of said flame spreader permits heated flue gases from said gas burner to pass through said flame spreader.
12. A burner assembly defining a lateral direction and a transverse direction, the lateral and transverse directions being perpendicular to each other, the burner assembly comprising:
a gas burner that extends between a first end portion and a second end portion along the transverse direction; and
a flame spreader having a heating surface positioned adjacent said gas burner, said flame spreader defining a first series of apertures and a second series of apertures, the first and second series of apertures distributed such that the first and second series of apertures are both substantially parallel to said gas burner along the transverse direction, the first and second series of apertures of said flame spreader distributed between the first and second end portions of said gas burner along the transverse direction, said gas burner positioned between the first and second series of apertures of said flame spreader along the lateral direction.
13. The burner assembly of claim 12 , wherein said flame spreader also has a back surface positioned opposite the heating surface of said flame spreader, wherein each aperture of the first and second series of apertures extends through said flame spreader from the heating surface of said flame spreader to the back surface of said flame spreader.
14. The burner assembly of claim 13 , further comprising a deflector mounted to said flame spreader and positioned adjacent the back surface of said flame spreader, said deflector positioned adjacent the first series of apertures of said flame spreader.
15. The burner assembly of claim 14 , wherein said deflector has a cooking surface that is spaced apart from the back surface of said flame spreader by about a distance, the distance being less than about one half of an inch.
16. The burner assembly of claim 15 , wherein each aperture of the first series of apertures of said flame spreader has an outlet on the back surface of said flame spreader, the outlets of the first series of apertures having an area, wherein the deflector has a cooking surface that faces the back surface of said flame spreader, the cooking surface having an area that is about equal to or larger than the area of the outlets of the first series of apertures.
17. The burner assembly of claim 12 , further comprising a louver, the louver positioned adjacent the first series of apertures of said flame spreader, the louver configured for regulating a flow of air through the first series of apertures of said flame spreader.
18. The burner assembly of claim 12 , wherein the heating surface of said flame spreader comprises a first portion and a second portion that define an angle φ therebetween, the angle φ being greater than about five degrees and less than about seventy degrees.