Investigation of the Stage Performance and Flow Fields in a Centrifugal Compressor with a Vaneless Diffuser

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ID: 76791
2014
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Ranked #14 of 48 articles by views in international journal of rotating machinery

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Abstract
The effect of the width of the vaneless diffuser on the stage performance and flow fields of a centrifugal compressor is studied numerically and experimentally. The diffuser width is varied by reducing the diffuser flow area from the shroud side (i.e., pinching the diffuser). Seven different diffuser widths are studied with numerical simulation. In the modeling, the diffuser width b/b2 is varied within the range 1.00 to 0.50. The numerical results are compared with results obtained in previous studies. In addition, two of the diffusers are further investigated with experimental measurement. The main finding of the work is that the pinch reduces losses in the impeller associated with the tip-clearance flow. Furthermore, it is shown that a too large width reduction causes the flow to accelerate excessively, resulting in a highly nonuniform flow field and flow separation near the shroud.
Reference Key
jaatinenvrri2014investigationinternational Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Jaatinen-Värri, Ahti;Grönman, Aki;Turunen-Saaresti, Teemu;Backman, Jari;
Journal international journal of rotating machinery
Year 2014
DOI
DOI not found
URL
http://dx.doi.org/10.1155/2014/139153
Keywords
Engineering (General). Civil engineering (General) Mechanical engineering and machinery Agriculture (General) mechanics of engineering. applied mechanics

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