Experimental and Numerical Flow Investigation through a Radial Flow Compressor Volute

Document Type : Original Article

Authors

• mohammad mojaddam ¹
• Ali Hajilouy Benisi ²

¹ Shahid Beheshti University

² Sharif University of Technology

10.22067/fum-mech.v28i1.49279

Abstract

An optimal design and fabrication of compressors requires flow investigation through the compressor components. Flow field inside the volute is fully three dimensional and turbulent. Better understanding of flow mechanism leads to improve the volute design procedure. In this research the experimental and numerical flow investigation through a radial flow compressor volute are performed to recognize flow field pattern and its effect on pressure loss. The whole compressor components are modeled and the flow field inside the volute is explored. Numerical studies are verified by measuring the pressures at different cross sections using pressure taps. Flow field investigation through volute cross sections at different operating range of the compressor is performed utilizing a five-hole probe. The experimental and numerical result differences for volute total pressure loss prediction are limited and decrease by mass flow rate increase. Flow field measuring results show the flow forced vortex structure at volute cross section. The effect of diffuser discharge on the fluid field in semi-external volute cross section is recognized as an extra pressure loss source in addition to creating the non-uniformity in velocity profile.

Keywords

• Radial flow compressor
• Volute
• Flow field
• Five-hole probe

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