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TECHNICAL PAPERS

On the Use of Five-Hole Probes in the Testing of Industrial Centrifugal Compressors

[+] Author and Article Information
José L. Gilarranz, Andrew J. Ranz, Jason A. Kopko, James M. Sorokes

Dresser-Rand Company, Paul Clark Drive, Olean, New York 14760

J. Turbomach 127(1), 91-106 (Feb 09, 2005) (16 pages) doi:10.1115/1.1812319 History: Received October 01, 2003; Revised March 01, 2004; Online February 09, 2005
Copyright © 2005 by ASME
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References

Figures

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Cross-section of a multi-stage test vehicle showing typical locations for instrumentation placement 1
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L-shaped 5-hole probe with a conical tip
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Probe coordinate system and angle conventions
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Internal instrumentation layout
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Combination total pressure/total temperature probe. Probe tip detail (top), probe located at exit of IGV (bottom).
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Location of 5-hole probes
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Overview of 5-hole probe location
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Location of hub side probes
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Location of shroud side probes
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Connection of 5-hole probes to pressure blocks
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Model of 5-hole probe installed in the shroud side of the compressor return bend
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View of probe showing the two coordinate systems that are used (PACS in red and MACS in blue)
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Definition of direction cosines for projection of the x-axis from the PACS into the machine axis coordinate system (MACS)
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Machine axis coordinate system definition
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Compressor polytropic head versus volumetric flow. Predicted (red-dashed) versus tested (blue-solid).
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Impeller exit velocity triangle
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(a) Alignment of impeller exit flow and LSD, (b) definition of flow angle deviation
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Flow angle at diffuser entrance (3 values U2/Ao)—hub side
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Flow angle at diffuser entrance (3 values U2/Ao)—shroud side
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Flow angle at return bend (design U2/Ao)—hub versus shroud
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Flow angle at diffuser entrance (design U2/Ao)—hub versus shroud
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Predicted impeller exit velocity
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Predicted impeller flow exit angle. Overall view (left) and detailed view of one flow passage (right) showing the location of the 5-hole probe measurements (dashed lines).
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Flow angle at diffuser entrance (design U2/Ao). Comparison of test data and CFD predictions at the design flow rate.
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Compressor polytropic head versus volumetric flow. Comparison between the performance of the original (red-dashed) and improved (blue-solid) prototype configurations.
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Flow angle at diffuser entrance (design U2/Ao)—hub versus shroud. Comparison between original (vaneless) and improved (rib) diffuser configurations.

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