Blade tip structure manner for restraining turbine blade tip leakage flow

• Main Authors: MA HONGWEI, WANG LIXIANG, TIAN YANGTAO
• Format: Patent
• Language: Chinese; English
• Published: 25.08.2017
• Subjects: BLASTING; ENGINE PLANTS IN GENERAL; HEATING; 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 belongs to the turbine pneumodynamics research field, and provides a blade tip structure manner for restraining turbine blade tip leakage flow. As shown in the picture, the blade tip structure is designed to be in a communication channel manner from the front edge to the tail edge, and a channel internal zone and a blade channel zone are communicated. A channel structure is similar to the manner that the blade top pressure face side and the suction force face side are each provided with a rib structure along the blade top molded line, fluid can flow out of a blade top gap through a channel from a front edge inlet, and the front end (2) and the tail (3) of each rib are subject to circular arc transition treatment. The ribs (1) on the two sides of the channel extend from the positions 3%-5% chord length away from the front edge to the positions 2%-3% chord length away from the blade tail edge, and the height of the ribs (1) is 2%-4% of chord length. By means of the blade tip structure manner, the