Potential Field Interactions in a Low-Speed Centrifugal Compressor

1998 ◽  
Vol 14 (6) ◽  
pp. 925-933 ◽  
Author(s):  
Albert J. Sanders ◽  
Sanford Fleeter
Keyword(s):  
Centrifugal Compressor ◽  
Potential Field ◽  
Low Speed

The Effect of Inlet Distortion on the Performance Characteristics of a Centrifugal Compressor

1983 ◽  
Vol 105 (2) ◽  
pp. 223-230 ◽  
Author(s):  
I. Ariga ◽  
N. Kasai ◽  
S. Masuda ◽  
Y. Watanabe ◽  
I. Watanabe
Keyword(s):  
Centrifugal Compressor ◽  
Total Pressure ◽  
Performance Characteristics ◽  
Performance Tests ◽  
Velocity Measurements ◽  
Test Rig ◽  
Low Speed ◽  
Inlet Distortion ◽  
Surge Margin ◽  
The Given

The present paper concerns itself with the effects of total pressure (and thus velocity) distortion on performance characteristics and surge margin of centrifugal compressors. Both radial and circumferential distortions were investigated. The performance tests as well as the velocity measurements within the impeller passages were carried out with a low-speed compressor test rig with the inlet honeycomb as the distortion generators and compared with the case of “no distortion” as a datum. The results indicated that the inlet distortion exerted unfavorable influences on the efficiency and the surge margin of the given compressor, though the influence of the radial distortion was much stronger than that of the circumferential one. Various distortion indices were further examined in order to correlate the performance to the inlet distortion.

scholarly journals The Effect of Inlet Distortion on the Performance Characteristics of a Centrifugal Compressor

1982 ◽  
Author(s):  
I. Ariga ◽  
N. Kasai ◽  
S. Masuda ◽  
Y. Watanabe ◽  
I. Watanabe
Keyword(s):  
Centrifugal Compressor ◽  
Total Pressure ◽  
Performance Characteristics ◽  
Performance Tests ◽  
Velocity Measurements ◽  
Test Rig ◽  
Low Speed ◽  
Inlet Distortion ◽  
Surge Margin ◽  
The Given

The present paper concerns itself with the effects of total pressure (and thus velocity) distortion on performance characteristics and surge margin of centrifugal compressors. Both radial and circumferential distortions were investigated. The performance tests as well as the velocity measurements within the impeller passages were carried out with a low speed compressor test rig with the inlet honeycomb as the distortion generators and compared with the case of “no distortion” as a datum. The results indicated that the inlet distortion exerted unfavorable influences on the efficiency and the surge margin of the given compressor, though the influence of the radial distortion was much stronger than that of the circumferential one. Various distortion indices were further examined in order to correlate the performance to the inlet distortion.

Crossover Systems Between the Stages of Centrifugal Compressors

1960 ◽  
Vol 82 (1) ◽  
pp. 155-167 ◽  
Author(s):  
Gaylord O. Ellis
Keyword(s):  
Centrifugal Compressor ◽  
Centrifugal Compressors ◽  
Low Speed ◽  
Conventional Design

The location and orientation of vanes in an annulus are established on the basis of two principles which result from a discussion of simple elbows. These principles are incorporated into a procedure for designing the diffuser vanes in the crossover passage between stages of a centrifugal compressor. To test the proposed design a low-speed model was built and tested and the results compared with a second model which represented a more conventional design.

Numerical Investigation of a High Speed Centrifugal Compressor Impeller

2005 ◽  
Author(s):  
Shun Kang
Keyword(s):  
Secondary Flow ◽  
Flow Structure ◽  
Centrifugal Compressor ◽  
High Speed ◽  
Independent Study ◽  
Low Speed ◽  
Operation Conditions ◽  
Compressor Impeller ◽  
Secondary Flow Structure ◽  
The One

This paper presents the CFD simulations of a high speed centrifugal compressor impeller using the NUMECA Fine/Turbo software with the one equation turbulence model of Spalart-Allmaras. The simulations are validated via comparison with the experimental data. The computational grid densities are changed with the impeller tip size and a grid independent study is carried out. The flow physics of the compressor impeller is numerically studied in details, in particular, the formation of shocks and their effects on the 3D flow and the secondary flow structure are analyzed at different operation conditions, with comparison to low speed machines. It is found that the energy loss production is greatly affected by the shock waves and their interaction with the boundary layers in the inducer portion, while in the other portion, the secondary flow structure is globally the same as those in low speed machines.

scholarly journals Reynolds Stress Tensor Measurements in a Centrifugal Compressor Vaned Diffuser

1996 ◽  
Author(s):  
Ali Pinarbasi ◽  
Mark W. Johnson
Keyword(s):  
Stress Tensor ◽  
Reynolds Stress ◽  
Centrifugal Compressor ◽  
Significant Influence ◽  
Turbulence Models ◽  
Leading Edge ◽  
Exit Plane ◽  
Vaned Diffuser ◽  
Low Speed ◽  
Reynolds Stress Tensor

Measurements of the full Reynolds stress tensor have been made throughout the vaned diffuser of a low speed centrifugal compressor. Results are presented close to the impeller exit plane and the vane leading edge plane at three inter vane positions. The results show that the vanes have a significant influence on the flow in the vaneless space. The mixing out of the blade wakes is enhanced and hence the Reynolds stress levels drop rapidly between the impeller exit and the vane leading edge. The flow also exhibits high levels of anisotropicity, particularly at the mid-vane position. This suggests that standard turbulence models are inadequate for modelling these flows using CFD and full Reynolds stress turbulence models are required.

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