An unshrouded centrifugal compressor would give up clearance very large in relation to the span of the blades, because centrifugal compressors produce a sufficiently large pressure rise in fewer stages. This problem is more acute for a low flow high-pressure ratio impeller. The large tip clearance would cause flow separations, and as a result it would drop both the efficiency and surge margin. Thus a design of a high efficiency and wide operation range for a centrifugal compressor is a great challenge. This paper describes a new development of high efficiency and a large surge margin flow coefficient of 0.145 centrifugal compressor. A viscous turbomachinery optimal design method developed by the authors for axial flow machine was further extended and used in this centrifugal compressor design. The new compressor has three main parts: impeller, a low solidity diffuser and volute. The tip clearance is under a special consideration in this design to allow impeller insensitiveness to the clearance. A three-dimensional low solidity diffuser design method is proposed and applied to this design. This design demonstrated to be successful to extend the low solidarity diffusers to high-pressure ratio compressor. The design performance range showed the total to static efficiency of the compressor being about 85% and stability range over 35%. The experimental results showed that the test results are in good agreement with the design.
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ASME Turbo Expo 2009: Power for Land, Sea, and Air
June 8–12, 2009
Orlando, Florida, USA
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-4886-9
PROCEEDINGS PAPER
Study of the Flow in Centrifugal Compressor Available to Purchase
C. Xu,
C. Xu
University of Wisconsin-Milwaukee, Milwaukee, WI
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R. S. Amano
R. S. Amano
University of Wisconsin-Milwaukee, Milwaukee, WI
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C. Xu
University of Wisconsin-Milwaukee, Milwaukee, WI
R. S. Amano
University of Wisconsin-Milwaukee, Milwaukee, WI
Paper No:
GT2009-59029, pp. 343-349; 7 pages
Published Online:
February 16, 2010
Citation
Xu, C, & Amano, RS. "Study of the Flow in Centrifugal Compressor." Proceedings of the ASME Turbo Expo 2009: Power for Land, Sea, and Air. Volume 5: Microturbines and Small Turbomachinery; Oil and Gas Applications. Orlando, Florida, USA. June 8–12, 2009. pp. 343-349. ASME. https://doi.org/10.1115/GT2009-59029
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