Vaneless diffuser core flow instability and rotating stall characteristics
conference paper
Since rotating stall in centrifugal compressors limits the operating range more knowledge on flow dynamics of rotating stall mechanism is required. To study the vaneless diffuser rotating stall a two-dimensional flow model is used in which the influence of the wall boundary layers is neglected. At the diffuser inlet rotating jet-wake velocity is prescribed and at the outlet constant static pressure is assumed. Under these conditions a two-dimensional rotating instability is observed, which is studied in terms of the rotating stall frequencies and pressure fluctuations. These pressure signals can be used to identify characteristics and behavior of rotating stall phenomena.
Topics
TNO Identifier
239427
ISBN
9781843342427
Source title
Institution of Mechanical Engineers, Fluid Machinery Group - Ninth European Fluid Machinery Congress: Applying the Latest Technology to New and Existing Process Equipment, 23-26 April 2006, The Hague, The Netherlands
Collation
13 p.
Pages
379-389
Files
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