Impedance tube having a machined union
View Patent ↗A combustion system can include: a liner defining a combustion chamber; a casing covering the combustion chamber; a first tube disposed in the liner; a machined union disposed inside the casing and connected to the first tube; a second tube passing through the casing and connected to the machined union; a sensor housing disposed outside the casing and connected to the second tube; and an infinite tube connected to the sensor housing.
1. An impedance tube, comprising:
a machined union including a first channel and a second channel;
a first tube connected to the first channel of the machined union;
a second tube connected to the second channel of the machined union;
a sensor housing including a sensor and connected to the second tube; and
an infinite tube connected to the sensor housing;
wherein the second channel includes a channel thread, and
wherein a threaded end of the second tube is coupled with the channel thread of the second channel.
2. The impedance tube according to claim 1 , wherein the first tube is attached to the machined union through a weld.
3. The impedance tube according to claim 1 , further comprising a compression fitting, wherein the second tube passes through the compression fitting.
4. The impedance tube according to claim 1 , wherein the first channel and the second channel are connected to each other at 90° degrees.
5. A combustion system, comprising:
a liner defining a combustion chamber;
a casing covering the combustion chamber;
a first tube disposed in the liner;
a machined union disposed inside the casing and connected to the first tube;
a second tube passing through the casing and connected to the machined union;
a sensor housing disposed outside the casing and connected to the second tube; and
an infinite tube connected to the sensor housing.
6. The combustion system according to claim 5 , wherein the liner comprises an inner liner surrounding the combustion chamber, an outer liner surrounding the inner liner, and a liner channel between the inner liner and the outer liner.
7. The combustion system according to claim 6 , wherein the first tube comprises a port at a distal end and the port faces the inner liner.
8. The combustion system according to claim 7 , wherein the port is welded to the inner liner.
9. The combustion system according to claim 7 , further comprising a supporter welded to the inner liner, wherein the first tube is attached to the supporter.
10. The combustion system according to claim 7 , wherein the casing comprises a casing bore and the second tube passes through the casing bore.
11. The combustion system according to claim 10 , further comprising a compression fitting disposed in the casing bore, wherein the second tube passes through the compression fitting.
12. The combustion system according to claim 11 , wherein the machined union comprises a first channel connected to the first tube and a second channel connected to the second tube.
13. The combustion system according to claim 12 , wherein the second channel includes a channel thread, and the second tube comprises a threaded end configured to be coupled with the channel thread of the second channel.
14. The combustion system according to claim 13 , wherein the first channel and the second channel are connected to each other at 90° degrees.
15. The combustion system according to claim 13 , wherein an inner diameter of the first tube is equal to or larger than ¼ inch.
16. The combustion system according to claim 13 , further comprising a sensor disposed in the sensor housing.
17. A gas turbine, comprising:
a compressor providing compressed air;
a combustor receiving the compressed air and producing combusted gas;
a turbine receiving the combusted gas from the combustor; and
an impedance tube monitoring combustion dynamics of the combustor,
wherein the impedance tube comprises:
a first tube disposed in the combustor;
a machined union disposed inside the combustor and connected to the first tube;
a second tube passing through a casing of the combustor and connected to the machined union;
a sensor housing disposed outside the combustor and connected to the second tube; and
an infinite tube connected to the sensor housing.
18. The gas turbine according to claim 17 , wherein the machined union comprises a first channel connected to the first tube and a second channel connected to the second tube.
19. The gas turbine according to claim 18 , wherein the second channel includes a channel thread, and the second tube comprises a threaded end coupled with the channel thread of the second channel.
20. The gas turbine according to claim 19 , further comprising a compression fitting passing through the casing, wherein the second tube passes through the compression fitting.