METHOD AND DEVICE FOR INFLUENCING SECONDARY FLOWS IN A TURBOMACHINE

摘要

The invention relates to a method for influencing secondary flows in a passage (20) between two adjacent rotating blades and guide vanes (14) of a turbomachine. Said blades project respectively from a lateral wall (12) of a hub or a housing of the turbomachine, and a fluid flows through the passage (20) in a main flow direction (23). According to the method, the following step is carried out in order to reduce internal losses: a stable auxiliary fluid whirl (36) is generated, said whirl rotating in the passage, perpendicular to the main flow direction (23) and in the opposite direction to a secondary whirl (28), using a whirl channel (30) formed in the lateral wall (12) of the hub or housing. Said channel is not rotationally symmetrical in relation to the hub axis.