Mechanism of the Occurrence of Rotordynamic Fluid Forces on a Closed Type Centrifugal Impeller in Whirling Motion

Hironori Horiguchi; Shinichiro Hata; Yutaro Wada; Julien Richert; Yoshinobu Tsujimoto

doi:10.5293/IJFMS.2019.12.4.380

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저자정보: Hironori Horiguchi (Osaka University) Shinichiro Hata (Osaka University) Yutaro Wada (Osaka University) Julien Richert (Osaka University) Yoshinobu Tsujimoto (Osaka University)

저널정보: 한국유체기계학회 International Journal of Fluid Machinery and Systems International Journal of Fluid Machinery and Systems Vol.12 No.4

발행연도: 2019.12

수록면: 380 - 387 (8page)

DOI: 10.5293/IJFMS.2019.12.4.380

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Rotordynamic fluid forces and a mechanism of their occurrence were examined in experiments and computations for a closed type centrifugal impeller in whirling motion. The rotordynamic fluid force on a front shroud was a main component of the rotordynamic fluid force. In a clearance between the front shroud and a casing, velocity disturbances were caused by an eccentricity of the impeller and a squeeze effect due to the whirling motion of the impeller. Appling the Bernoulli equation to disturbed swirling flow in the clearance in a relative coordinate fixed on the whirling motion, the pressure disturbance which generated the rotordynamic fluid force could be reasonably explained.

#Centrifugal Impeller #Rotordynamic Fluid Force #Whirling Motion #Clearance Flow

참고문헌 (7)

참고문헌 신청

Tsujimoto,Y. / 1996 / Oneof the chapter of vonKarmanInstitute for Fluid Dynamics / VanDen Braembussche, R. A.

Jery, B. / 1985 / Forces on Centrifugal Pump Impellers / Proceedings of the Second InternationalPump Symposium :21~29

Moore, J. / 2001 / Rotordynamic Force Prediction of Whirling Centrifugal Impeller Shroud Passages Using Computational Fluid Dynamic Techniques / Trans. ASME, Journalof Engineering forGasTurbines and Power 123:910918

Suzuki, T. / 2008 / A Numerical Analysis of Rotordynamic FluidForces onanArtificial Heart PumpImpeller inWhirlingMotion / Trans. JSME,Series B 74(738):310~316

Suzuki, T. / 2008 / Experimental Measurement of Rotordynamic Fluids Forces on an Open-Type Centrifugal Impeller in Whirling Motion / Proceedings of the 12th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery(ISROMAC12) :1~7

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