| 摘要 |
A pre-whirl generating apparatus ( 26 ) is provided that employs deformable air deflecting vanes ( 46 ) adjacent the inlet ( 18 ) of a radial air compressor ( 12 - 22 ), which vanes ( 46 ) can be mechanically deformed to generate positive, neutral, or negative pre-whirl flow to the compressor. A minimum number of parts are used to position one or more thin, deformable vanes ( 46 ) in the intake channel ( 34 ) leading to the compressor inlet ( 18 ). In their undeformed position, the vanes ( 46 ) do not deflect the incoming air, thereby causing little or no flow restriction. To achieve the desired positive or negative pre-whirl of flow to the compressor ( 12 - 22 ), the trailing edge ( 62 ) of the vanes ( 46 ) are deflected transverse to the direction of flow in the channel ( 34 ) in either the positive or negative direction.
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