Diffuser with dual-column blades arranged radially and serially

Abstract

A diffuser for centrifugal air compressor has front and back rings of blades, which are serially arranged in a ring and are alternatively arranged between two rings. The curved directions for the blades in different rings are different. Its advantages are high efficiency and wide range of flow variation in enlarged high-efficiency region and stable working region.

Description

technical field [0001] The invention relates to a vane diffuser of centrifugal compressor technology, that is, a radially serially arranged double-row vane diffuser. Background technique [0002] The performance comparison test of the compressor equipped with a single-row vane diffuser and a radially arranged double-row vane diffuser shows that: the radially arranged double-row vane diffuser can pass through the different matching positions of the front and rear cascades. The combination of changes in mutual positional geometric parameters such as gaps and overlapping degrees and the appropriate selection of the shape and chord length ratio of the two rows of cascade blades can form different shapes of convergent channels, thereby effectively realizing the two rows of diffuser cascades. Controlling the flow around (controlling the flow separation and aerodynamic load distribution on the blade surface) significantly improves the performance of the centrifugal compressor, make...

AI Technical Summary

Problems solved by technology

The limitations and defects of this structure are: the shape configuration of the radial series double-row vane diffuser, which can make the performance of the centrifugal compressor significantly improved compared with the single-row vane diffuser, is limited to the back surface of the outlet part of the front row of blades. The converging channel formed on the ventral surface of the inlet part of the rear row of blades is in a narrow state (the flow section of the channel is very narrow) ( figure 1 )

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