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A combustor may include an interior flow path therethrough, a number of fuel nozzles in communication with the interior flow path, and an inlet guide vane system positioned about the interior flow path to create a swirled flow therein. The inlet guide vane system may include a number of windows posi

A combustor may include an interior flow path therethrough, a number of fuel nozzles in communication with the interior flow path, and an inlet guide vane system positioned about the interior flow path to create a swirled flow therein. The inlet guide vane system may include a number of windows positioned circumferentially around the fuel nozzles. The inlet guide vane system may also include a number of inlet guide vanes positioned circumferentially around the fuel nozzles and adjacent to the windows to create a swirled flow within the interior flow path.

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1. A combustor, comprising: an interior flow path therethrough;a plurality of axially extending and radially spaced apart fuel nozzles in communication with the interior flow path; andan inlet guide vane system positioned about the interior flow path and upstream of the plurality of axially extendin

1. A combustor, comprising: an interior flow path therethrough;a plurality of axially extending and radially spaced apart fuel nozzles in communication with the interior flow path; andan inlet guide vane system positioned about the interior flow path and upstream of the plurality of axially extending and radially spaced apart fuel nozzles to create a swirled flow therein, the inlet guide vane system, comprising: a plurality of windows positioned circumferentially around and upstream of the plurality of axially extending and radially spaced apart fuel nozzles; anda plurality of adjustable inlet guide vanes positioned circumferentially around and upstream of the plurality of axially extending and radially spaced apart fuel nozzles and adjacent to the plurality of windows. 2. The combustor of claim 1, wherein the plurality of adjustable inlet guide vanes extends from a lower portion of a flow passage. 3. The combustor of claim 2, wherein a radial distance between the lower portion of the flow passage to the window of the flow passage may be varied. 4. The combustor of claim 1, wherein the plurality of adjustable inlet guide vanes are adjustable relative to the plurality of windows. 5. The combustor of claim 4, wherein the inlet guide vane system further comprises: a plurality of axially extending axes positioned circumferentially around and upstream of the plurality of axially extending and radially spaced apart fuel nozzles and adjacent to the plurality of windows; andone or more drive motors having a respective axes of the plurality of axially extending axes extending therethrough, wherein each of the plurality of adjustable inlet guide vanes is associated with the respective axes such that the plurality of adjustable inlet guide vanes are rotated about the respective axes to adjust the plurality of inlet guide vanes relative to the plurality of windows. 6. The combustor of claim 1, further comprising an end cover and wherein the inlet guide vane system is mounted about the end cover. 7. The combustor of claim 1, further comprising a combustion liner and a flow sleeve defining an outer flow path therethrough and wherein the inlet guide vane system is positioned between the outer flow path and the interior flow path. 8. The combustor of claim 1, further comprising a cap member with an outer diameter region and a central region and wherein the swirling flow comprises a substantially even distribution across the outer diameter region and the central region. 9. The combustor of claim 1, wherein the plurality of axially extending and radially spaced apart fuel nozzles comprises a plurality of small tube nozzles. 10. The combustor of claim 1, wherein the inlet guide vane system acts as a flow conditioner. 11. A combustor, comprising: an interior flow path therethrough;a plurality of axially extending and radially spaced apart premixed direct injection fuel nozzles in communication with the interior flow path; andan inlet guide vane system positioned about the interior flow path and upstream of the plurality of axially extending and radially spaced apart premixed direct injection fuel nozzles to create a swirling flow therein, the inlet guide vane system, comprising:a plurality of windows positioned circumferentially around and upstream of the plurality of axially extending and radially spaced apart premixed direct injection fuel nozzles; and a plurality of adjustable inlet guide vanes positioned circumferentially around and upstream of the plurality of axially extending and radially spaced apart premixed direct injection fuel nozzles and adjacent to the plurality of windows. 12. The combustor of claim 11, wherein the plurality of adjustable inlet guide are adjustable relative to the plurality of windows. 13. The combustor of claim 11, wherein the plurality of adjustable inlet guide vanes extends from a lower portion of a flow passage. 14. The combustor of claim 13, wherein a radial distance between the lower portion of the flow passage to the window of the flow passage may be varied. 15. The combustor of claim 11, further comprising an end cover and wherein the inlet guide vane system is mounted about the end cover. 16. The combustor of claim 11, further comprising a combustion liner and a flow sleeve defining an outer flow path therethrough and wherein the inlet guide vane system is positioned between the outer flow path and the interior flow path. 17. The combustor of claim 11, further comprising a cap member with an outer diameter region and a central region and wherein the swirling flow comprises a substantially even distribution across the outer diameter region and the central region. 18. The combustor of claim 17, wherein the swirling flow comprises a higher pressure near the outer diameter region of the cap member as compared to the central region. 19. The combustor of claim 11, wherein the plurality of axially extending and radially spaced apart premixed direct injection nozzles comprises a plurality of small tube nozzles. 20. A combustor, comprising: an interior flow path therethrough;a cap member;a plurality of axially extending and radially spaced a art fuel nozzles positioned within the cap member and in communication with the interior flow path;a plurality of windows positioned circumferentially around and upstream of the plurality of fuel nozzles; anda plurality of adjustable inlet guide vanes positioned circumferentially around and upstream of the plurality of fuel nozzles and adjacent to the plurality of windows.