COOLING STRUCTURE FOR TRAIL CYLINDER OF GAS TURBINE COMBUSTOR

• Main Authors: ISHIBASHI YOJI, HAYASHI NORIYUKI, TSUKAHARA SATOSHI
• Format: Patent
• Language: English
• Published: 21.12.1990
• Subjects: AIR INTAKES FOR JET-PROPULSION PLANTS; BLASTING; COMBUSTION ENGINES; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS; GAS-TURBINE PLANTS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; WEAPONS

PURPOSE:To provide a cooling structure which enhances its cooling function while restricting thermal stress by dividing a space between a cover covering a part of a tail cylinder and the latter into several small spaces with the use of partition plates. CONSTITUTION:An impinging type cooling cover plate 13 is fixed to at least a part of a tail cylinder on the turbine stator vane 6 side, and is formed therein with several small holes 18, defining an air passage 11 between the cover plate 13 and the tail cylinder 4. An air hole 12 is formed in the tail cylinder 4 at a position where the tail cylinder 4 makes contact with the air passage 11. In this arrangement, there are provided partition plates 14 so as to divide the air passage 11 into several spaces. With this arrangement, heat can be smoothly transmitted to the cover plate 13 from the tail cylinder 4 by way of the partition plates 14. Thereby the cooling function of the tail cylinder 4 can be enhanced being caused by an increase in heat transmission of the outer periphery of the cover plate 13 through a guide wall 6. Further, the temperature of the tail cylinder 4 approaches the temperature of the tail cylinder 4 due to the provision of the partition plates 14, thereby it is possible to reduce thermal stress caused by a difference in temperature.