Effect of Surface Roughness of Impeller Channel in Centrifugal Compressor on Its Performance

901632

09/01/1990

Event
International Off-Highway & Powerplant Congress & Exposition
Authors Abstract
Content
Influences of the surface roughness of a centrifugal compressor on its performance were examined. The experiments were conducted by varying the surface roughness within the impeller channel as well as Reynolds number. The surface roughness of the pressure, suction and hub walls were varied by means of sticking the sand of a definite grain size onto the walls, while that of the shroud wall was roughened by machining it with a lathe. Reynolds number was varied by changing air pressure in a closed circuit of duct containing the compressor.
Efficiency of the compressor decreased gradually as the surface roughness was increased, and the reduction of the efficiency amounted to about five percent when the relative roughness was increased from 3.2X10-3 to 14.0X10-3.
Shifting of the critical Reynolds number was not affected so much through the variation of the roughness.
Meta TagsDetails
DOI
https://doi.org/10.4271/901632
Pages
11
Citation
Mashimo, T., "Effect of Surface Roughness of Impeller Channel in Centrifugal Compressor on Its Performance," SAE Technical Paper 901632, 1990, https://doi.org/10.4271/901632.
Additional Details
Publisher
Published
Sep 1, 1990
Product Code
901632
Content Type
Technical Paper
Language
English