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Prediction of Stress on Pump Blade by One-Way Coupled Method of Fluid and Structure Simulation

[+] Author Affiliations
Katsutoshi Kobayashi

Hitachi Ltd., Hitachinaka, Ibaraki, Japan

Shigeyoshi Ono

Hitachi Technologies and Services, Ltd., Tsuchiura, Ibaraki, Japan

Ichiro Harada, Yoshimasa Chiba

Hitachi Plant Technologies, Ltd., Tsuchiura, Ibaraki, Japan

Paper No. IMECE2007-41371, pp. 37-43; 7 pages
doi:10.1115/IMECE2007-41371
From:
  • ASME 2007 International Mechanical Engineering Congress and Exposition
  • Volume 4: Design, Analysis, Control and Diagnosis of Fluid Power Systems
  • Seattle, Washington, USA, November 11–15, 2007
  • Conference Sponsors: ASME
  • ISBN: 0-7918-4298-3 | eISBN: 0-7918-3812-9
  • Copyright © 2007 by ASME

abstract

The stress of a mixed flow pump with open type blades was measured and predicted by a one-way coupled simulation to evaluate the reliability of pump strength. The mechanism generating a large stress was investigated by numerical results. The stress became maximum at 70%Q flow rate of the off design point in both experimental and numerical results. Although the shaft power and total head became maximum at 0%Q flow rate of the shut off point, these did not relate to cause the largest stress. The pressure distribution on the surface of blade was investigated by simulated flow field. The flow separation at 0%Q flow rate occurred near the hub side on the suction surface of blade and loads became largest on the stream line of hub side among the all flow rates. On the other hand, the flow separation at 70%Q flow rate occurred over the whole area through the leading edge and loads became largest on the stream line of tip side among the all flow rates. It was found that the stress could be determined from the location where the flow separation was generated and the area size of it.

Copyright © 2007 by ASME
Topics: Fluids , Simulation , Stress , Pumps , Blades

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