초록 ▼

A set of blades for a turbine which includes a group of blades disposed between an upper plate (12) and a lower plate (11), the group of blades defining a group of passages (3). The set of blades includes ducts (13,23) in the upper plate (12) and/or in the lower plate (11), said ducts leading, from

A set of blades for a turbine which includes a group of blades disposed between an upper plate (12) and a lower plate (11), the group of blades defining a group of passages (3). The set of blades includes ducts (13,23) in the upper plate (12) and/or in the lower plate (11), said ducts leading, from one end situated at a point in the neighborhood of the concave surfaces of the blades, at the constriction (10) of the passage, to its other end located at a point downstream from the set of blades. A reduction in the high pressure on the concave surfaces in only two zones, one vertically above the lower plate (12) and the other vertically below the upper plate (11), reduces secondary losses, while the distribution of the pressure remains optimum in the part of the passages where the flow is non-turbulent.

대표청구항 ▼

A set of blades for a turbine, said set including an upper plate and a lower plate and a group of blades disposed between said upper plate and said lower plate and which therefore define a group of passages along which a turbine feed fluid flows, each passage being delimited by the concave surface o

A set of blades for a turbine, said set including an upper plate and a lower plate and a group of blades disposed between said upper plate and said lower plate and which therefore define a group of passages along which a turbine feed fluid flows, each passage being delimited by the concave surface of one blade and the convex surface of the blade next to it and by the lower plate and the upper plate and secondly, at least two ducts associated with each blade, one in the upper plate and the other in the lower plate, one end of each of these ducts opening into a passage and the other end of each of these ducts opening at a point located downstream from said set of blades, the improvement wherein, for each duct (13, 14, 23, 24), the duct end which opens into the passage is located in proximity to the concave surface of one blade which delimits said passage, and remote from the convex surface of the other blade delimiting that passage, and at the flow constriction (10, 20) at the level of maximum flow constriction between blades.