Importance

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Abstract

Disclosed is a fluid-flow machine comprising at least one disc-shaped rotor provided with flow channels for a flow medium. The intake openings of the flow channels are disposed on one side of the rotor, while the respective exit openings are located at the other axial surface, the distance of all said intake openings from the axis of rotation being different from that of said exit openings. Each flow channel has a radially outer and a radially inner elbow, each elbow having two legs forming an angle of about 90.degree. with one another. One leg of one said elbow leads to the intake opening and extends in the direction of the relative velocity of the intake flow prevailing thereat, one leg of the other elbow leading to the exit opening and extending in the direction of the relative velocity of the exit flow prevailing thereat. The respective other legs of the two deflector elbows are aligned with a substantially radial connecting section connecting said deflector elbows with one another. In this fluid-flow machine, a decrease of the pressure drop per stage is to be achieved without a reduction of circumferential and absolute velocities. Further a small volume flow is to be combined with a relative low pressure drop per stage, and the high speed capacity of the machine is to be augmented. To this effect, the leg of the one deflector elbow leading to said intake opening and the leg of the other deflector elbow leading to said exit opening are directed such that the tangential components of the relative velocities at the intake and exit openings are unidirectional or that said tangential components are completely absent at the intake openings or at the exit openings.

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First Claim