摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensive gas turbine combustor. SOLUTION: The gas turbine combustor comprises a main nozzle 3 consisting independently of a cylindrical center tube 4 having an oil fuel passage 6 inside which oil fuel flows, a cylindrical outer tube 5 arranged on the outermost periphery, and a supporting tube 8 arranged between the center tube 4 and the outer tube 5. The supporting tube 8 has an inner diameter forming a clearance serving as an air heat insulating layer 9 between the center tube 4 and the outer periphery. It consists of a plurality of supporting portions 8c formed on the upstream side in the axial direction in radial contact with the inner periphery of the outer tube 5, a plurality of groove portions 7a formed between the supporting portions 8c along the axial direction, and a cylindrical portion 8b formed on the downstream side in the axial direction with its outer diameter not larger than the outer diameter of the groove portion 7a. A space formed between the outer tube 5 and the groove portion 7a and a space formed between the outer tube 5 and the cylindrical portion 8b form the gas fuel passage in which the gas fuel flows. COPYRIGHT: (C)2009,JPO&INPIT
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