Research on hydrodynamic performance of ducted propeller after structure improvement of duct

作者：Sun, Yu; Su, Yumin^*; Liu, Wei

来源：Journal of Huazhong University of Science and Technology (Natural Science Edition), 2016, 44(6): 68-71.

DOI：10.13245/j.hust.160613

• Calculation results
• Ducted propeller
• Experimental modeling
• Hydrodynamic performance
• Parameter optimization
• Propulsion efficiency
• Structure improvement
• Thrust coefficients

The experimental model of 19A duct was improved. Protrusion structure was fixed on the latter part of the inner duct wall in order to increase the propulsion efficiency of the ducted propeller. The SST k-ωmodel was applied to hydrodynamic performance calculations of Ka4-55 propeller with 19A duct, and the thrust coefficient, torque coefficient and open water efficiency of the propulsion system as a function of advance coefficient were obtained. By comparing the experimental and calculated values of the ducted propeller, the reliability of the calculation method was verified. The parameters of the improved duct was optimized and the duct model with a higher propulsion efficiency was obtained. The calculation results indicate that the improved duct can increase the efficiency of the ducted propeller. At the design advance coefficient J=0.5, the efficiency of the ducted propeller is increased by 2.62%. By comparing the pressure distributions and velocity distributions in the duct before and after the improvement, the mechanism of the efficiency increasing is analyzed.

• 出版日期2016
• 单位哈尔滨工程大学