Branch gas film hole structure for cooling gas turbine engine

• Main Authors: CHI ZHONGRAN, REN JING, JIANG HONGDE
• Format: Patent
• Language: Chinese; English
• Published: 11.12.2013
• Subjects: AIR INTAKES FOR JET-PROPULSION PLANTS; BLASTING; COMBUSTION APPARATUS; COMBUSTION ENGINES; COMBUSTION PROCESSES; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS; ENGINE PLANTS IN GENERAL; 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; INDEXING SCHEME FOR ASPECTS RELATING TONON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES ORJET-PROPULSION PLANTS; INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUSSUBCLASSES OF CLASSES F01-F04; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES; STEAM ENGINES; WEAPONS

The invention provides a branch gas film hole structure for cooling a gas turbine engine, which is applicable to cooling high-temperature components such as a combustion chamber and a turbine of the gas turbine engine. Branch gas film holes are formed equidistantly in rows; each branch gas film hole comprises a main hole, a first branch hole and a second branch hole; the holes are straight holes with circular sections; the two branch holes are connected with the main hole in the same position in each branch gas film hole; and positions of flow directions of the first branch holes and the second branch holes are in tandem, so that the first branch hole of each branch gas film hole and the second branch hole of the adjacent branch gas film hole form mutual interference. According to the branch gas film hole structure, an outlet area is increased by the branch holes; a gas film cooling coverage area is increased; a flow field structure facilitating gas film cooling coverage is constructed due to the mutual inter