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Aero-hydrodynamics based determination of geometry of a high-speed ship rowing wheel unit

Authors: Yakimov N.M., Popov S.D., Chuvashev S.N. Published: 21.12.2015
Published in issue: #6(105)/2015  

DOI: 10.18698/0236-3941-2015-6-50-58

 
Category: Mechanical Engineering and Machine Science | Chapter: Machine Science, Drive Systems, and Machine Components  
Keywords: rowing wheel, higher speed of the ship, computational experiment, aerodynamic drag, efficiency

The article considers the possibility of using a rowing wheel at higher speeds of the ship. The hydrodynamics of flows over the blades is considered along with the aerodynamic drag of the whole wheel. In the case of a wheel positioned outside the ship body, it is necessary to use the fair water protecting the wheel from approaching air flows. For a shell with a good separation of the wheel from the outside airflow, an effect of rarefaction is observed. This effect causes an additional boat-tail aerodynamic drag. The article shows the efficiency of using the horizontal reflectors in combination with wide outlet and inlet channels of the shell. Record-breaking efficiency of the rowing wheel is achieved at the ship speed up to 45 km/hour, which estimated up to 50%.

References

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