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Fuel Consumption and Performance Prediction in Outboard Motors for High-speed Planing Boats using CFD Simulation

Article of Honda R&D Technical Review Vol.25 No.1

Summary

The research discussed in this paper set out to develop a simulator able to quantitatively predict the cruising fuel consumption and cruising performance of an outboard motor used for a small, high-speed planing boat; the target accuracy for prediction was within a range of ±5%. The research focused on the fact that the thrust performance of a propeller has a significant impact on cruising fuel consumption and cruising performance. In order to evaluate the accuracy of the fuel consumption and performance simulator, simulation results were compared with the results of a full-scale cruising test. This comparison suggested that the simulator was able to satisfactorily predict the cruising fuel consumption and cruising performance of outboard motors. In particular, prediction results agreed with full-scale measurement results to within a range of ±2.79% (±1.7 km/h) for maximum speeds and ±4.55% for cruising fuel consumption. These results indicate that the simulator is able to quantitatively predict the cruising fuel consumption and the cruising performance of an outboard motor. More importantly, the results demonstrate that the simulator can be used to identify optimal propeller specifications and gear reduction ratios, which have traditionally been based on experience. It was therefore concluded that the simulator possesses considerable potential as an effective tool able to be used in the development of environmentally friendlier outboard motors with outstanding cruising fuel economy and cruising performance.

Reference

(1) Yoshimura, H., Miyauchi, T., Tsubouchi, M.: Reduction of Fuel Consumption for Medium-sized Outboard Motors, SAE paper, 2007-32-0008, (2007)
(2) Yonezawa, M., Matsuda, Y., Tawa, H., Shidara, S., Bungo, K., Suzuki, Y.: Development of High-power, High Fuel Economy BF150 Outboard Motor, Honda R&D Technical Review, Vol. 16, No. 1, p. 29-38
(3) Tsunoda, M., Furuya, K.: Development of the application of the automotive engine technology to the V6 four stroke outboard motor, SAE paper, 2002-32-1809, (2002)
(4) http://hawaii-marine.com/
(5) Troesch, A.: Dynamics and Hydrodynamics of High Speed Craft, PASI 2010 in Dynamics and Control of Manned and Unmanned Marine Vehicles, Colombia, June, (2010)
(6) Kawamura, T.: Numerical Simulation of Propulsion and Cavitation Performance of Marine Propellers, International Propulsion Symposium IPS’10, Japan, 4-2, April, (2010)
(7) Hashiguchi, K.: Numerical Simulation of Flow around a Highly Skewed Propeller, 19th CFD Symposium, Japan, C6-1, December, (2005)
(8) Hasuike, N., Yamasaki, S., Ando, J. Okazaki, A.: NUMERICAL STUDY ON CAVITATION EROSION RISK OF MARINE PROPELLERS OPERATING IN WAKE FLOW, International Propulsion Symposium IPS’10, Japan, 4-4, April, (2010)
(9) Hong, F., Zhang, Z., Krasilnikov, V., Tang, D.: CFD Simulation and Hydrodynamic Performance Analysis for Podded Propulsors in Oblique Flow, International Propulsion Symposium IPS’10, Japan, 4-3, April, (2010)
(10) Katayama, T., Kaneko, T., Hori, Y.: Development of Estimation Method of Running Performance for Planing Craft with Outboard Engine, Journal of the Japan Society of Naval Architects and Ocean Engineers, Vol. 5, p. 195-203, June, (2007)
(11) ANSYS, Inc. Fluent 6.3 User Guide, Chapter 10: Modeling Flows with Rotating Reference Frames
(12) http://www.nmri.go.jp/fluids/Staff/kudo/database/SEIUN-pressure/readme.html

Author (organization or company)

Shunsuke KURIOKA(Power Products R&D Center)

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