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CFD Calculation of Cavitation in Outboard Motors

Article of Honda R&D Technical Review Vol.30 No.2

Summary

CFD calculations accounting for cavitation in outboard motor propellers were performed to save calculation cost and calculation accuracy. The impact of the boundary layer mesh resolution on the main propeller performance values of thrust coefficient, torque coefficient, and propeller efficiency was clarified. The obtained results of CFD calculation were qualitatively consistent with the results of model tests, and its accuracy was within ±7%. With the above, cavitation effects can be accounted for from the early stages of outboard motor development using CFD calculation.

Reference

(1) Ukon, Y., Fujisawa, J., Kudo T., Kurobe Y.: Application of a Theoretical Design Method to Full Scale Supercavitating Propellers for High-Speed Boats, Transactions of the West-Japan Society of Naval Architects, Vol. 100, p. 133-143, (2000) (in Japanese)
(2) Suzuki, K., Sasaki, N., Kawamura, T.: Sentaiteiko to Suishin (Sempaku Kaiyo Kogaku Sirizu 2), SEIZANDO-SHOTEN PUBLISHING CO., LTD., p. 143-162, (2012) (in Japanese)
(3) Kurioka, S.: Fuel Consumption and Performance Prediction in Outboard Motors for High-speed Planing Boats using CFD Simulation, Honda R&D Technical Review, Vol. 25, No. 1, p. 176-183
(4) Fujiyama, K.: Numerical Simulation of Ship Hull Pressure Fluctuation Induced by Cavitation on Propeller with Capturing the Tip Vortex, International Symposium on Marine Propulsors smp’15, June, (2015)
(5) Tomimatsu, S., Kado, K., Otani, R.: Cavitation CFD in Pump Development, Turbomachinery, Vol. 42, No. 11, p. 707-712, (2014) (in Japanese)
(6) Nohmi, M.: Remaining Problems on Cavitation CFD, Turbomachinery, Vol. 42, No. 11, p. 694-700, (2014) (in Japanese)
(7) Kamiya, A.: Prediction of the Cavitation Effect on the Flow Around the Outboard Motor Propeller Blade Hydrofoil Section Using CFD, SAE Technical Paper, 2013-32-9157, (2013)
(8) Watanabe, T., Sakamoto, H.: Method for Predicting Erosion Due to Cavitation of Outboard-Motor, SAE Technical Paper, 2014-32-0054, (2014)
(9) Zwart, P. J., Gerber, A. G., Belamri T.: A Two-Phase Flow Model for Predicting Cavitation Dynamics, ICMF 2004 International Conference on Multiphase Flow, Japan, Paper No. 152, May 30-June 3, (2004)
(10) ANSYS, Inc. Fluent 16.0 Theory Guide, Chapter 4: Turbulence, (2014)
(11) Kawamura, T., Maeda, M.: Marine Propeller Cavitation Tunnel at The University of Tokyo, Journal of the Japan Institution of Marine Engineering, Vol. 43, No. 5, p. 720-725, (2008) (in Japanese)

Author (organization or company)

Ayaka NANGO(Power Products R&D Center)、Yuka IGA(Institute of Fluid Science, Tohoku University)

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