Numerical Investigation of the Unsteady Flow Inside a Centrifugal Compressor Stage With Pipe Diffuser

Author:

Grates Daniel R.,Jeschke Peter1,Niehuis Reinhard2

Affiliation:

1. Institute of Jet Propulsion and Turbomachinery, RWTH Aachen University, Aachen 52062, Germany

2. Institute of Jet Propulsion, University of Federal Armed Forces Munich, Neubiberg 85577, Germany

Abstract

The subject of this paper is the investigation of unsteady flow inside a transonic centrifugal compressor stage with a pipe-diffuser by utilizing unsteady 3D Reynolds-averaged Navier–Stokes simulations (unsteady 3D URANS). The computational fluid dynamics (CFD) results obtained are compared with detailed experimental data gathered using various steady and unsteady measurement techniques. The basic phenomena and mechanisms of the complex and highly unsteady flow inside the compressor with a pipe-diffuser are presented and analyzed in detail.

Publisher

ASME International

Subject

Mechanical Engineering

Reference17 articles.

1. A Novel Low-Cost Diffuser for High-Performance Centrifugal Compressors;ASME J. Eng. Power,1969

2. Supersonic Radial Diffusers,1970

3. Straight Channel Diffuser Performance at High Inlet Mach Numbers,1963

4. Detailed Measurements Within a Selection of Pipe Diffusers for Centrifugal Compressors,1998

5. Experimental Investigation on the Diffuser Flow of a Centrifugal Compressor Stage With Pipe Diffuser,2008

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