COMBUSTOR AND METHOD FOR REDUCING THERMAL STRESSES IN COMBUSTOR

• Main Authors: STOIA LUCAS JOHN, MELTON PATRICK BENEDICT
• Format: Patent
• Language: English
• Published: 25.07.2013
• Subjects: AIR INTAKES FOR JET-PROPULSION PLANTS; BLASTING; COMBUSTION APPARATUS; COMBUSTION ENGINES; COMBUSTION PROCESSES; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS; GAS-TURBINE PLANTS; GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGHVELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; WEAPONS

PROBLEM TO BE SOLVED: To provide a method for reducing thermal stresses in a combustor.SOLUTION: A combustor includes a first annular casing, a second annular casing, and a joint between the first and second annular casings. A flow sleeve surrounds a combustion chamber to define an annular passage, and an annular shield inside the first annular casing extends upstream from the joint and prevents a working fluid flowing through the annular passage from contacting at least a portion of the first annular casing. A method for reducing thermal stresses in a combustor includes: a step of flowing a working fluid from a compressor through an annular passage between a combustion chamber and a flow sleeve inside the combustor, a step of shielding the working fluid flowing through the annular passage from contact with at least a portion of a joint between first and second annular casings; and a step of shielding the working fluid flowing through the annular passage from contact with at least a portion of the first annular casing downstream from the joint.