Combustor liner panel and rail with diffused interface passage for a gas turbine engine combustor

1. A liner panel for use in a combustor of a gas turbine engine, the liner panel comprising:

a cold side; and

a rail that extends from the cold side to a terminal surface spaced apart, facing, and substantially parallel to a shell supporting the liner panel, the rail includes

a first diffusion interface passage surface and

a second diffusion interface passage surface,

the first diffusion interface passage surface angled with respect to the second diffusion interface passage surface, wherein the first diffusion interface passage surface at least partially defines with an adjacent interface passage surface of an adjacent rail of an adjacent liner panel a pre-diffuser section along one side of a diffusion interface passage axis angled at 30-90 degrees with respect to a hot side of the liner panel, and the second diffusion interface passage surface at least partially defines a diffuser section along one side of the diffusion interface passage axis, the diffuser section of the rail defines a height with respect to the cold side between 0.05 H-0.6 H, where H is the height of the rail and the diffuser section at least partially defines an expanding passage that extends at an angle between 1-15 degrees with respect to a surface that forms the pre-diffuser section.

2. The liner panel as recited in claim 1 , wherein the liner panel is one of a forward liner panel and an aft liner panel of the combustor.

3. The liner panel as recited in claim 1 , wherein the rail is a periphery rail that defines an edge of the liner panel.

4. The liner panel as recited in claim 1 , wherein the rail includes a ramped end section.

5. The liner panel as recited in claim 1 , wherein the rail is trapezoidal shaped.

6. The liner panel as recited in claim 1 , wherein the rail is ramp shaped.

7. A combustor for a gas turbine engine comprising: a support shell;

a first liner panel mounted to the support shell, the first liner panel including a first rail that extends from a cold side of the first liner panel to a first terminal surface spaced apart, facing, and substantially parallel to the shell, the first rail includes

a diffusion interface passage surface that is non-perpendicular to a hot side;

a second liner panel mounted to the support shell, the second liner panel including a second rail that extends from a cold side of the second liner panel to a second terminal surface spaced apart, facing, and substantially parallel to the shell, the second rail spaced from the first rail to at least partially form the diffusion interface passage, wherein

the diffusion interface passage defines a diffusion interface passage axis oriented at 30-90 degrees with respect to a hot side of the second liner panel, the diffusion interface passage defines a pre-diffuser section and a diffuser section along the diffusion interface passage axis: wherein

the pre-diffuser section is defined between a first aft interface passage surface of the first rail and a first forward interface passage surface of the second rail, and

a multiple of studs that extend from the first liner panel, the first liner panel mounted to the support shell via the multiple of studs; and

a multiple of studs that extend from the second liner panel, the second liner panel mounted to the support shell via the multiple of studs.

8. The combustor as recited in claim 7 , wherein the first liner panel is a forward liner panel of the combustor.

9. The combustor as recited in claim 8 , wherein the second liner panel is an aft liner panel of the combustor.

10. The combustor as recited in claim 7 , wherein the diffuser section of the first rail defines a height with respect to the cold side of the first liner panel between 0.05 H-0.6 H, where H is the height of the first rail.

11. The combustor as recited in claim 10 , wherein the diffuser section of the first rail defines an expanding passage oriented at an angle between 1-15 degrees from a second aft diffusion interface passage surface of the first rail.

12. The combustor as recited in claim 7 , wherein the diffuser section of the second rail defines a height with respect to the cold side of the second liner panel between 0.05 H-0.6 H where H is the height of the second rail.

13. The combustor as recited in claim 12 , wherein the diffuser section of the second rail defines an expanding passage oriented at an angle between 1-15 degrees from a second forward diffusion interface passage surface of the second rail.

14. The combustor as recited in claim 7 , wherein the first rail is trapezoidal shaped.

15. The combustor as recited in claim 7 , wherein the first rail comprises a second aft diffusion interface passage surface of the diffuser section.

16. The combustor as recited in claim 15 , wherein the first aft diffusion interface passage surface is angled relative to the second aft diffusion interface passage surface.

17. The combustor as recited in claim 7 , wherein the second aft diffusion interface passage surface is perpendicular to the hot side of the first panel.

18. The combustor as recited in claim 16 , wherein the second rail comprises a second forward diffusion interface passage surface of the diffuser section, the first forward diffusion interface passage surface angled relative to the second forward diffusion interface passage surface.

19. A combustor for a gas turbine engine comprising:

a first liner panel comprises

a first rail that extends from a cold side of the first liner panel to a first terminal surface spaced apart, facing, and substantially parallel to the shell, the first rail comprises

a first aft diffusion interface passage surface of the pre-diffuser section, and

a second aft diffusion interface passage surface of the diffuser section, the first aft diffusion interface passage surface is angled relative to the second aft diffusion interface passage surface; and

a second liner panel aft of the first liner panel, the second liner panel comprises

a second rail that extends from a cold side of the second liner panel to a second terminal surface spaced apart, facing, and substantially parallel to the shell, the second rail spaced from the first rail to at least partially form the diffusion interface passage, the second rail comprises

a first forward diffusion interface passage surface of the pre-diffuser section and

a second forward diffusion interface passage surface of the diffuser section, the first forward diffusion interface passage surface angled to the second forward diffusion interface passage surface.

20. The combustor as recited in claim 19 , wherein the second aft diffusion interface passage surface is perpendicular to the hot side.

21. The combustor as recited in claim 19 , wherein the first rail is trapezoidal shaped.

22. The combustor as recited in claim 19 , wherein the diffusion interface passage defines a diffusion interface passage axis oriented at 30-90 degrees.

23. The combustor as recited in claim 19 , further comprising:

a support shell;

a multiple of studs that extend from the first liner panel, the first liner panel mounted to the support shell via the multiple of studs; and

a multiple of studs that extend from the second liner panel, the second liner panel mounted to the support shell via the multiple of studs.