Combustion device comprising plural swirling blades and gas turbine system having the same

1. A combustion device comprising:

a combustion chamber;

a first injection hole group including:

a first plurality of hydrogen injection holes facing inside of the combustion chamber, the first plurality of hydrogen injection holes being provided apart from one another at intervals in a circumferential direction of the combustion chamber;

a first outer air injection hole facing the inside of the combustion chamber and extending in the circumferential direction on a radially outer side with respect to the first plurality of hydrogen injection holes, the first outer air injection hole being annular; and

a first inner air injection hole facing the inside of the combustion chamber and extending in the circumferential direction on a radially inner side with respect to the first plurality of hydrogen injection holes, the first inner air injection hole being annular; a second injection hole group including:

a second plurality of hydrogen injection holes facing inside of the combustion chamber, the second plurality of hydrogen injection holes being provided apart from one another at intervals in the circumferential direction of the combustion chamber;

a second outer air injection hole facing the inside of the combustion chamber and extending in the circumferential direction on a radially outer side with respect to the second plurality of hydrogen injection holes, the second outer air injection hole being annular; and

a second inner air injection hole facing the inside of the combustion chamber and extending in the circumferential direction on a radially inner side with respect to the second plurality of hydrogen injection holes, the second inner air injection hole being annular;

wherein the first injection hole group is provided on a radially outer side with respect to the second injection hole group;

a first outer swirling blade provided in the first outer air injection hole and inclined in the circumferential direction with respect to a combustion-chamber-side axial direction, the combustion-chamber-side axial direction being a part of an axial direction of the combustion chamber, the part facing the combustion chamber;

a first inner swirling blade provided in the first inner air injection hole and inclined to a same side as the first outer swirling blade in the circumferential direction with respect to the combustion-chamber-side axial direction;

a second outer swirling blade provided in the second outer air injection hole and inclined in the circumferential direction with respect to the combustion-chamber-side axial direction; and

a second inner swirling blade provided in the second inner air injection hole and inclined to a same side as the second outer swirling blade in the circumferential direction with respect to the combustion-chamber-side axial direction.

2. The combustion device according to claim 1 ,

wherein a direction in which the first outer swirling blade and the first inner swirling blade are inclined with respect to the combustion-chamber-side axial direction and a direction in which the second outer swirling blade and the second inner swirling blade are inclined with respect to the combustion-chamber-side axial direction are on different sides in the circumferential direction.

3. The combustion device according to claim 1 ,

wherein a direction in which the first outer swirling blade and the first inner swirling blade are inclined with respect to the combustion-chamber-side axial direction and a direction in which the second outer swirling blade and the second inner swirling blade are inclined with respect to the combustion-chamber-side axial direction are on a same side in the circumferential direction.

4. The combustion device according to claim 1 , further comprising:

a third air injection hole provided on a radially inner side with respect to the second injection hole group, the third air injection hole facing the inside of the combustion chamber.

5. The combustion device according to claim 2 , further comprising:

a third air injection hole provided on a radially inner side with respect to the second injection hole group, the third air injection hole facing the inside of the combustion chamber.

6. The combustion device according to claim 3 , further comprising:

a third air injection hole provided on a radially inner side with respect to the second injection hole group, the third air injection hole facing the inside of the combustion chamber.

7. The combustion device according to claim 4 ,

wherein the third air injection hole extends in the circumferential direction, the third air injection hole formed in an annular shape, and

the third air injection hole is provided with a third swirling blade inclined in the circumferential direction with respect to the combustion-chamber-side axial direction.

8. The combustion device according to claim 5 ,

wherein the third air injection hole extends in the circumferential direction, the third air injection hole formed in an annular shape, and

the third air injection hole is provided with a third swirling blade inclined in the circumferential direction with respect to the combustion-chamber-side axial direction.

9. The combustion device according to claim 6 ,

wherein the third air injection hole extends in the circumferential direction, the third air injection hole formed in an annular shape, and

the third air injection hole is provided with a third swirling blade inclined in the circumferential direction with respect to the combustion-chamber-side axial direction.

10. The combustion device according to claim 7 ,

wherein a direction in which the third swirling blade is inclined with respect to the combustion-chamber-side axial direction in the third air injection hole and a direction in which the second outer swirling blade and the second inner swirling blade are inclined with respect to the combustion-chamber-side axial direction are on different sides in the circumferential direction.

11. The combustion device according to claim 8 ,

wherein a direction in which the third swirling blade is inclined with respect to the combustion-chamber-side axial direction in the third air injection hole and a direction in which the second outer swirling blade and the second inner swirling blade are inclined with respect to the combustion-chamber-side axial direction are on different sides in the circumferential direction.

12. The combustion device according to claim 9 ,

wherein a direction in which the third swirling blade is inclined with respect to the combustion-chamber-side axial direction in the third air injection hole and a direction in which the second outer swirling blade and the second inner swirling blade are inclined with respect to the combustion-chamber-side axial direction are on different sides in the circumferential direction.

13. The combustion device according to claim 1 , further comprising:

a burner plate that closes an end of the combustion chamber,

wherein the first and second injection hole groups are formed in the burner plate.

14. The combustion device according to claim 13 ,

wherein a manifold communicating with the plurality of hydrogen injection holes is formed in the burner plate.

15. A gas turbine system comprising:

the combustion device according to claim 1 .