International Journal of Fluid Machinery and Systems

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

DOI QR Code

Effect of Internal Flow in Symmetric and Asymmetric Micro Regenerative Pump Impellers on Their Pressure Performance

  • Received : 2008.09.08
  • Accepted : 2009.01.28
  • Published : 2009.03.01
Download PDF
⟨ Previous Next ⟩

Abstract

The effect of symmetric and asymmetric micro regenerative pump impellers on their pressure performance was studied. The shut off head of the pump with the symmetric impeller was about 2.5 times as that with the asymmetric impeller. The computation of the internal flow was performed to clarify the cause of the increase of the head. It was found that the contribution of the angular momentum supply was larger than that of shear stress for the head development in both cases. The larger head and momentum supply in the case of the symmetric impeller were caused by larger recirculated flow rate and larger angular momentum difference between the inlet and outlet to the impeller. The larger recirculated flow rate was caused by smaller pressure gradient in the direction of recirculated flow. The decrease of the circumferential velocity in the casing was attributed to the smaller local flow rate in the casing.

Keywords

References

  1. Wilson, W. A., Santalo, M. A., and Oelrich, J. A., 1955, “A Theory of the Fluid-Dynamic Mechanism of RegenerativePumps,” Transactions of the ASME, Vol.77, No.8, pp. 1303-1316.
  2. Shimosaka, M. and Yamazaki, S., 1960, “Research on the Characteristics of Regenerative Pump (1st Report, Influence ofFlow Channel and Impeller),” Bulletin of JSME, Vol.3, No.10, pp. 185-190. https://doi.org/10.1299/jsme1958.3.185
  3. Yamazaki, S. and Tomita, Y., 1971, “Research on the Performance of the Regenerative Pump with inclined blades (1stReport, Performance and Internal Flow),” Transactions of the Japan Society of Mechanical Engineers, Vol.37, No.295, pp.506-514 (in Japanese). https://doi.org/10.1299/kikai1938.37.506
  4. Murata, S., Inaba, T., and Hayashi, M., 1980, “An Investigation of Regenerative Fan (1st Report, Influence ofGeometries of Impeller and Intake,” Transactions of the JSME, Series B, Vol.46, No.410, pp. 1968-1976 (in Japanese). https://doi.org/10.1299/kikaib.46.1968

Cited by

  1. The effect of blade outlet angle on performance and internal flow condition of mini turbo-pump vol.20, pp.1, 2011, https://doi.org/10.1007/s11630-011-0431-3
  2. Unsteady internal flow conditions of mini-centrifugal pump with splitter blades vol.22, pp.1, 2013, https://doi.org/10.1007/s11630-013-0596-z
  3. Performance analysis of mini centrifugal pump with splitter blades vol.22, pp.6, 2013, https://doi.org/10.1007/s11630-013-0664-4
  4. Performance and Internal Flow Condition of Mini Centrifugal Pump with Splitter Blades vol.6, pp.1, 2013, https://doi.org/10.5293/IJFMS.2013.6.1.011