船用螺旋桨逆向改型设计方法研究

逆向工程技术可以实现产品的快速创新,将该技术应用到船用螺旋桨改型设计中,突破了螺旋桨的传统设计模式。本研究通过对叶片数字化模型进行整体扭转变形和翘曲变形实现了桨叶的改型,并结合CFD计算发现这种改型方法对提高螺旋桨的推进效率具有重要的作用。结果显示：扭转变形5°,10°,15°,其效率分别提高了4.3%,6.75%,9.42%。再扭转15°的条件下分别对叶梢翘曲±10 mm,发现翘曲-10 mm时推进效率略有降低,而翘曲+10 mm后推进效率有显著提高。

The Research of Marine Propeller Reverse Retrofit Design Method

Reverse engineering technology can achieve rapid product innovation, which is applied to modify the propellers in ships. This method breaks through the traditional design patterns of propellers. In this paper the digital mold of the propeller was modified by torsional deformation of the entire leaf and warp deformation of theStipSofSpropeller. We found this modification method played an important role of improving the propulsion efficiency of the propeller. The results showed that the efficiency of the propellers with the torsional deformation of 5°,10°,15° were improved 4.3%,6.75%,9.42% respectively. The propeller tip with the torsional deformation of 15° was warped ±10 mm, when the warp was -10 mm, the efficiency was reduced slightly, while the efficiency of the propeller with the warp of 10 mm was improved significantly.