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A study on the vaneless diffuser and volute casing design for the improvement of small centrifugal compressors
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소형 원심 압축기의 성능 향상을 위한 베인 없는 디퓨저와 볼류트 케이싱의 설계에 관한 연구

논문 기본 정보

Type
Academic journal
Author
Journal
Korea Academy Industrial Cooperation Society Journal of the Korea Academia-Industrial cooperation Society Vol.16 No.6 KCI Accredited Journals
Published
2015.6
Pages
3,722 - 3,730 (9page)

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A study on the vaneless diffuser and volute casing design for the improvement of small centrifugal compressors
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The performance improvement of a small centrifugal compressor for waste water treatment has been conducted by the design change of vaneless diffuser and volute casing. Existing two compressors use a common impeller, but the width and length of the vaneless diffuser and the cross-sectional shape of the volute casing are different, respectively. Based on the experiment of the existing two compressors and their CFD results, the design of the vaneless diffuser and the volute casing has been changed. It was found that the strength of the interaction among the volute tongues, the vaneless diffusers and the impellers of two existing/one improved compressors, was affected by the cross-sectional area and inlet radial length of the volute casing including system losses’ change. The efficiency of the impeller with one existing design was increased as the decrease of the width of the vaneless diffuser, but losses at the diffuser were accumulated. In conclusion, approximately 2.88%p efficiency increase at the design point of the new compressor with the improved design has been confirmed by CFD analysis results.
#Performance test #Volute casing #Vaneless diffuser #CFD #Centrifugal compressor

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References (12)

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[보고서] - John D. Stanitz / 1952 / One-dimensional compressible flow in vaneless diffusers of radial and mixed flow centrifugal compressors, including effects of friction, heat transfer and area change google schola [기타자료] - David Jpikse / 1996 / Centrifugal compressor design and performance / Concepts ETI, INC : 3-1 ~ 3-9 google schola [보고서] - W. Byron Brown / 1947 / Friction coefficients in a vaneless diffuser google schola [학술대회논문] - Yoen-haeng Heo / 2013 / Numerical analysis study on prediction about skin friction coefficient of the vaneless diffusers in centrifugal compressor / The Spring conference of the korean society of mechanical engineers : 193 ~ 194 dbpia [학술지(정기간행물)] - Ahti Jaatinen-Värri / 2013 / Experimental study of centrifugal compressor vaneless diffuser width / Journal of Mechanical Science and Technology 27 (4) : 1011 ~ 1020 google schola

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