Combustor liner panel end rail cooling interface passage for a gas turbine engine combustor

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

a forward liner panel including an aft rail that extends linearly from a cold side of the forward liner panel such that a first central axis passes through the aft rail, the first central axis forming an acute angle with respect to the cold side of the forward liner panel, the cold side of the forward liner panel having a multiple of effusion passages, each of the multiple of effusion passages oriented at a surface angle with respect to an axial gaspath flow through the combustor; and

an aft liner panel including a forward rail that extends linearly from a cold side of the aft liner panel such that a second central axis passes through the forward rail, the second central axis forming an obtuse angle with respect to the cold side of the aft liner panel, the aft rail and the forward rail form an interface passage therebetween, the forward rail includes a discontinuous rail end surface of a distal end thereof displaced from the cold side of the aft liner panel, the discontinuous rail end surface located along a length of the forward rail to provide only intermittent contact with a support shell to which the aft liner panel is mounted.

2. The liner panel assembly as recited in claim 1 , wherein the discontinuous rail end surface includes a circular passage.

3. The liner panel assembly as recited in claim 1 , wherein the discontinuous rail end surface includes a semi-circular passage.

4. The liner panel assembly as recited in claim 1 , wherein the discontinuous rail end surface includes an oval passage.

5. The liner panel assembly as recited in claim 1 , wherein the discontinuous rail end surface includes a “castle” shaped passage.

6. The liner panel assembly as recited in claim 1 , wherein the surface angle of each of the multiple of effusion passages is between 15-90 degrees with respect to the cold side of the forward liner panel.

7. A combustor for a gas turbine engine comprising:

a support shell;

a forward liner panel mounted to the support shell via a multiple of studs, the forward liner panel including an aft rail that extends linearly from a cold side of the forward liner panel such that a first central axis passes through the aft rail, the first central axis forming an acute angle with respect to the cold side of the forward liner panel; and

an aft liner panel mounted to the support shell via a multiple of studs, the aft liner panel including a forward rail that extends linearly from a cold side of the aft liner panel such that a second central axis passes through the forward rail, the second central axis forming an obtuse angle with respect to the cold side of the aft liner panel, the aft rail and the forward rail form an interface passage therebetween, the forward rail includes a discontinuous rail end surface of a distal end thereof displaced from the cold side of the aft liner panel, the discontinuous rail end surface located along a length of the forward rail to provide intermittent contact with the support shell and a communication path with the interface passage.

8. The combustor as recited in claim 7 , wherein the forward rail is a portion of a peripheral rail.

9. The combustor as recited in claim 7 , wherein an aft surface of the aft rail that faces the interface passage is contiguous with a hot side of the forward liner panel.

10. The combustor as recited in claim 7 , wherein a forward surface of the forward rail that faces the interface passage is contiguous with a hot side of the aft liner panel.

11. The combustor as recited in claim 7 , wherein a forward surface of the aft rail that faces the interface passage is contiguous with a hot side of the forward liner panel and an aft surface of the forward rail that faces the interface passage is contiguous with a hot side of the aft liner panel.

12. A method for cooling a combustor liner panel assembly for a gas turbine engine comprising:

communicating airflow through a discontinuous rail end surface, the combustor liner panel assembly comprising:

a support shell;

a forward liner panel mounted to the support shell via a multiple of studs, the forward liner panel including an aft rail that extends linearly from a cold side of the forward liner panel such that a first central axis passes through the aft rail, the first central axis forming an acute angle with respect to the cold side of the forward liner panel; and

an aft liner panel mounted to the support shell via a multiple of studs, the aft liner panel including a forward rail that extends linearly from a cold side of the aft liner panel such that a second central axis passes through the forward rail, the second central axis forming an obtuse angle with respect to the cold side of the aft liner panel, the aft rail and the forward rail form an interface passage therebetween, the forward rail includes the discontinuous rail end surface of a distal end thereof displaced from the cold side of the aft liner panel, the discontinuous rail end surface located along a length of the forward rail to provide intermittent contact with the support shell and a communication path with the interface passage.

13. The method as recited in claim 12 , further comprising communicating the airflow through the discontinuous rail end surface toward the aft rail.

14. The method as recited in claim 12 , further comprising communicating the airflow through the forward rail toward the aft rail.

15. The method as recited in claim 12 , further comprising communicating the airflow through the discontinuous rail end surface adjacent to the support shell.