The KSFM Journal of Fluid Machinery (한국유체기계학회 논문집)

Korean Society for Fluid machinery (한국유체기계학회)
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Improvement of Performance Instability and Miniaturization of Very Low Specific Speed Centrifugal Pump

극저비속도 원심펌프의 불안정성능개선 및 소형화에 관한 연구

  • Published : 2007.08.01
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Abstract

The ratio of disk friction loss in a centrifugal pump is very large for the total pump loss in the range of very low specific speed. Therefore, impeller radius should be shortened to increase the pump efficiency because the disk friction loss is proportional to the fifth power of impeller radius. In order to compensate the decreased head by the shortened impeller radius, vane angle at impeller outlet should be increased. However, as the vane angle at impeller outlet becomes larger, performance instability occurs at low flow rate regions. In this study, J-Groove is adopted to suppress the performance instability and detailed examination is performed for the influence of the J-Groove on the pump performance. The results show that J-Groove gives good effect on the suppression of performance instability. Moreover, as J-Groove increases pump head considerably, the pump size can be smaller for head requirements.

Keywords

References

  1. Stepanoff, A. J., 1957, 'Centrifugal and Axial Flow Pumps (2nd ed),' John Wiley and Sons, pp. 69-89
  2. Kurokawa, J., Matsui J., Kitahora, T., Saha, S. L., Matsumoto, K. and Tsutsui, A., 1997, 'Performance of Very Low Specific Speed Impeller,' Turbomachinery, Vol. 25, No. 7, pp. 337-345
  3. Kurokawa, J., Matsumoto, K., Yao, W., Matsui, J. and Imamura, H., 2000, 'Study on the Optimum Configuration of a Volute Pump of Very Low Specific Speed,' Trans. JSME, Ser.B, Vol. 66, No. 644, pp. 1132-1139 https://doi.org/10.1299/kikaib.66.1132
  4. Matsumoto, K., Kurokawa, J., Matsui, J. and Imamura, H., 1999, 'Performance Improvement and Peculiar Behavior of Disk Friction and Leakage in Very Low Specific-Speed Pumps,' Trans. JSME, Ser.B, Vol. 65, No. 640, pp. 4027-4032 https://doi.org/10.1299/kikaib.65.4027
  5. 최영도, 카가와슈사쿠, 쿠로카와준이치, 2006, '원형케이싱이 극저비속도 원심펌프의 성능에 미치는 영향.' 유체기계저널, 제9권, 제1호,pp. 32-39 https://doi.org/10.5293/KFMA.2006.9.1.032
  6. Kurokawa, J., 1990, 'Performance of Low Specific Speed Volute Pump,' Turbomachinery, Vol 18, No. 5, pp. 285-291
  7. Kurokawa, J., Saha, S. L., Matsui, J. and Kitahora, T., 2000, 'Passive Control of Rotating Stall in a Parallel-Wall Vaneless Diffuser by radial Grooves,' ASME J. Fluids Eng., Vol. 122, pp. 90-96 https://doi.org/10.1115/1.483230
  8. Saha, S. L., Kurokawa, J., Matsui, J. and Imamura, H., 2001, 'Passive Control of Rotating Stall in a Parallel-Wall Vaned Diffuser by J-Grooves,' ASME J. Fluids Eng., Vol. 123, pp. 507-515 https://doi.org/10.1115/1.1374214
  9. Saha, S. L., Kurokawa, J., Matsui, J. and Imamura, H., 2002, 'Suppression of Performance Curve Instability of a Mixed Flow Pump by Use of J-Groove,' ASME J. Fluids Eng., Vol. 124, pp. 592-597
  10. 최영도, 쿠로카와준이치, 2006, '극저비속도 원심펌프의 펌프성능 및 흡입성능 향상,' 유체기계저널, 제9권, 제3호, pp. 29-35 https://doi.org/10.5293/KFMA.2006.9.3.029
  11. ANSYS Inc., 2004, 'ANSYS CFX Documentation,' Ver. 5.7.1, Waterloo, Ontario, Canada

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