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A Detailed Loss Analysis Methodology for Centrifugal Compressors

Written by Luying Zhang, Loukia Kritioti, Peng Wang, Jiangnan Zhang, Mehrdad Zangeneh.

What's inside?

A deep understanding of loss mechanisms inside a turbomachine is crucial for the design and analysis work. By quantifying the various losses generated from different flow mechanisms, a targeted optimization can be carried out on the blading design. In this paper, an evaluation method for computational fluid dynamics simulations has been developed to quantify the loss generation based on entropy production in the flow field.

The method has been applied to both subsonic and transonic centrifugal compressors, where internal flow is complex due to the Coriolis acceleration and the curvature effect. An evaluation of loss decomposition is obtained at various operational conditions. The impact of design modification is also assessed by applying the same analysis to an optimized design.

A Detailed Loss Analysis Methodology for Centrifugal Compressors Cover

In this publication, you will:

  1. Discover how a loss evaluation method can be developed to quantify the loss creation based on entropy generation.
  2. See how by suppressing the passage secondary flow and limiting the blade profile loss, the impeller peak efficiency can be improved.
  3. Understand the advantage of using a 3D Inverse Design method: with the knowledge of the loss decomposition, it is possible to carry out targeted optimization using the inverse design method, which can control the flow field of a specific design through blade loading distribution.