International Journal of Fluid Machinery and Systems

Korean Society for Fluid machinery (한국유체기계학회)
권호 표지
DOI QR코드

DOI QR Code

Efficiency Increase and Input Power Decrease of Converted Prototype Pump Performance

  • Oshima, Masao (Formerly Department of Mechanical Engineering, Kanagawa Institute of Technology)
  • Received : 2015.08.06
  • Accepted : 2015.11.13
  • Published : 2016.09.30
Download PDF
⟨ Previous Next ⟩

Abstract

The performance of a prototype pump converted from that of its model pump shows an increase in efficiency brought about by a decrease in friction loss. As the friction force working on impeller blades causes partial peripheral motion on the outlet flow from the impeller, the increase in the prototype's efficiency causes also a decrease in its input power. This paper discusses results of analyses on the behavior of the theoretical head or input power of a prototype pump. The equation of friction-drag coefficient for a flat plate was applied for the analysis of hydraulic loss in impeller blade passages. It was revealed that the friction-drag of a flat plate could be, to a certain degree, substituted for the friction drag of impeller blades, i.e. as a means for analyzing the relationship between a prototype pump's efficiency increase and input power decrease.

Keywords

References

  1. Oshima, M., 2010, "A Study on Performance Conversion from Model to Prototype," IJFMS, Vol. 3, No. 3, July-Sept., pp. 221-226
  2. IEC 60193:1999, "Hydraulic turbines, storage pumps and pump-turbines - Model acceptance tests," 2nd ed.
  3. JIS B 8327: 2002, "Testing method for performance of pump, using model pump"
  4. IEC 62097:2009, "Hydraulic machines, radial and axial - Performance conversion method from model to prototype," 1st ed.
  5. JIS B 8327: 2013, "Testing method for performance of pump, using model pump"
  6. Kurokawa, T., 1959, "Efficiency conversion of centrifugal pump from model to prototype based on test results," Journal. JSME, Vol. 62, No. 485, pp. 960-967 (in Japanese)
  7. Hutton, S. P. and Fay, A., 1974, "Scaling up head, flow and power curves for water turbines and pumps," Proc. IAHR Symp. on Hydraulic Machinery and Cavitation, Vienna, pp. X4-1-X4-19 and 248-251
  8. Ida, T., 2002, "Scale effect on actual Euler's head in hydraulic turbomachinery," Turbomachinery, Vol. 30. No.6, pp. 336-348 (in Japanese)
  9. Pelz P. F. and Stonjek, S. S., 2013, "A Second Order Exact Scaling Method for Turbomachinery Performance Prediction," IJFMS, Vol. 6, No. 4, pp.177-187 https://doi.org/10.5293/IJFMS.2013.6.4.177
  10. Bellary, S. A. and Samad, A., 2015, "Numerical Analysis of Centrifugal Impeller for Different Viscous Liquids," IJFMS, Vol. 8, No. 1, pp. 36-45 https://doi.org/10.5293/IJFMS.2015.8.1.036
  11. Ida, T., 1964, "On the Characteristics of Mixed-Flow Propeller Pumps," Bulletin JSME, Vol. 7, No.28, pp. 792-800 https://doi.org/10.1299/jsme1958.7.792
  12. Schlichting, H., 1979, Boundary Layer Theory, 7th ed., McGraw Hill, New York, p.654
  13. Toyokura, T., 1960, "Studies on Characteristics of Axial Flow Pumps (Part 5, Experimental Investigation on the Impeller Performance)," Bulletin JSME, Vol. 4, No. 14, pp. 321-330 https://doi.org/10.1299/jsme1958.4.321
  14. Toyokura, T., 1960, "Studies on Characteristics of Axial Flow Pumps (Part 6, Experimental Studies on Hydraulic Losses)," Bulletin JSME, Vol. 4, No.14, pp. 330-340 https://doi.org/10.1299/jsme1958.4.330
  15. Oshima, M., 1972, "Blade Characteristics of Axial -flow Impellers," Proc. 2nd Intern. JSME Symp. Fluid Mach. and Fluidics, Tokyo, pp. 119-125
  16. Oshima, M., 1976, "Streamlines through axial flow impeller and axial thrust," Turbomachinery, Vol. 4, No. 2, pp. 102-109 (in Japanese)
  17. Horie, C. and Kawaguchi, K., 1959, "Cavitation Tests on Axial Flow Pump," Bulletin JSME, Vol.2, No. 5, pp. 187-195 https://doi.org/10.1299/jsme1958.2.187
  18. Stepanoff, A. J., 1957, Centrifugal and Axial Flow Pumps, John Wiley and Sons, New York, 2nd ed. p.79
  19. Shirakura, M., 1959, "Effect of surface roughness of impeller passages on volute pump performance," Journal. JSME, Vol. 62, No.485, pp. 890-899 (in Japanese)