International Journal of Fluid Machinery and Systems

한국유체기계학회 (Korean Society for Fluid machinery)
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Inducer Design to Avoid Cavitation Instabilities

  • 투고 : 2009.06.08
  • 심사 : 2009.09.15
  • 발행 : 2009.12.01
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초록

Three inducers were designed to avoid cavitation instabilities. This was accomplished by avoiding the interaction of tip cavity with the leading edge of the next blade. The first one was designed with extremely larger leading edge sweep, the second and third ones were designed with smaller incidence angle by reducing the inlet blade angle or increasing the design flow rate, respectively. The inducer with larger design flow rate has larger outlet blade angle to obtain sufficient pressure rise. The inducer with larger sweep could suppress the cavitation instabilities in higher flow rates more than 95% of design flow coefficient, owing to weaker tip leakage vortex cavity with stronger disturbance by backflow vortices. The inducer with larger outlet blade angle could avoid the cavitation instabilities at higher flow rates, owing to the extension of the tip cavity along the suction surface of the blade. The inducer with smaller inlet blade angle could avoid the cavitation instabilities at higher flow rates, owing to the occurrence of the cavity first in the blade passage and its extension upstream. The cavity shape and suction performance were reasonably simulated by three dimensional CFD computations under the steady cavitating condition, except for the backflow vortex cavity. The difference in the growth of cavity for each inducer is explained from the difference of the pressure distribution on the suction side of the blades.

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참고문헌

  1. Tsujimoto, Y., Horiguchi, H., Fujii, A., 2004, “Non-Standard Cavitation Instabilities in Inducers,” Proceedings of the 10th International Symposium on Transport Phenomenon and Dynamic of Rotating Machinery, ISROMAC10-2004-020, pp. 1-11.
  2. Acosta, A, Tsujimoto, Y., Yoshida, Y., Azuma, S., 2001, “Effects of Leading Edge Sweep on the Cavitation Characteristics of Inducer Pumps,” International Journal of Rotating Machinery, Vol. 7, No. 6, pp. 397-404. https://doi.org/10.1155/S1023621X01000343
  3. Kamijo, K., Yoshida, M., Tsujimoto, Y., 1993, “Hydraulic and Mechanical Performance of LE-7 LOX Pump Inducer,” Journal of Propulsion and Power, Vol. 9,No. 6, pp. 819-826. https://doi.org/10.2514/3.23695
  4. Fujii, A., Mizuno, S., Horiguchi, H., Tsujimoto, Y., 2005, “ Suppression of Cavitation Instabilities by Jet Injection at Inducer Inlet,” Proceeding of the ASME 2005 Fluid Engineering Division Summer Meeting, FEDSM2005-77380, pp. 1477-1482. https://doi.org/10.1115/FEDSM2005-77380
  5. Shimiya, N., Fujii, A., Horiguchi, H., Uchiumi, M., Kurokawa, J., and Tsujimoto, Y., 2008, “Suppression of Cavitation Instabilities in an Inducer by J-Groove,” ASME Journal of Fluids Engineering, Vol. 130, No. 1, pp. 021302-1-021302-7. https://doi.org/10.1115/1.2829582
  6. Kang, D., Cervone, A., Yonezawa, K., Horiguchi, H., Kawata, Y., Tsujimoto, Y., 2007, “Effect of Blade Geometry on Tip Leakage Vortex of Inducer,” Proceeding of the 9th Asian International Conference on Fluid Machinery, AICFM9-042, pp. 1-6.
  7. Watanabe, T., Kang, D., Cervone, A., Kawata, Y., and Tsujimoto, Y., 2008, “Choked Surge in a Cavitating Turbopump Inducer,” International Journal of Fluid Machinery and Systems, Vol. 1, No. 1, pp. 64-75. https://doi.org/10.5293/IJFMS.2008.1.1.064
  8. Kang, D., Yonezawa, C., Horiguchi, H., Kawata, Y., and Tsujimoto, Y., 2009, “Cause of Cavitation Instabilities in Three-Dimensional Inducer,” International Journal of Fluid Machinery and Systems, Vol. 2, No. 3, pp. 206-214. https://doi.org/10.5293/IJFMS.2009.2.3.206
  9. Horiguchi,H.,Watanabe,S.,Tsujimoto,Y. and Aoki, M., 2000, “Theoretical Analysis of Alternate Blade Cavitation in Inducers,” ASME Journal of Fluids Engineering, Vol. 122, No. 1, pp. 156-163. https://doi.org/10.1115/1.483238

피인용 문헌

  1. Numerical Evaluation of Dynamic Transfer Matrix and Unsteady Cavitation Characteristics of an Inducer vol.5, pp.3, 2012, https://doi.org/10.5293/IJFMS.2012.5.3.126
  2. Effects of tip clearance on performance and characteristics of backflow in a turbopump inducer vol.227, pp.8, 2013, https://doi.org/10.1177/0957650913499014
  3. Tip Clearance Effects on Cavitation Evolution and Head Breakdown in Turbopump Inducer vol.29, pp.6, 2013, https://doi.org/10.2514/1.B34766
  4. Effect of Preinducer in Reducing Net Positive Suction Head Requirement of a Pump vol.33, pp.2, 2017, https://doi.org/10.2514/1.B35514
  5. Cavitation instabilities in hydraulic machines vol.52, pp.1, 2013, https://doi.org/10.1088/1757-899X/52/1/012005
  6. Analysis of the Staggered and Fixed Cavitation Phenomenon Observed in Centrifugal Pumps Employing a Gap Drainage Impeller vol.139, pp.3, 2017, https://doi.org/10.1115/1.4034952
  7. Source Term Based Modeling of Rotating Cavitation in Turbopumps vol.141, pp.6, 2019, https://doi.org/10.1115/1.4042302