With the development of the large and high-speed ships, the cavitation and radiated noise of marine propellers have been more and more concerned. This paper presents a numerical simulation of marine propellers with the ridge structures, inspired by the airfoils with the bionic ridge surfaces. The bionic method is applied to redesign the blade sections of a marine propeller, and the ridge structures are arranged between the leading edge and the thickest point. Four bionic propellers are established by changing the style and distribution area of the ridge structures on the blade surface. The cavitation morphology, pressure distribution and open water characteristics are analyzed with the software STAR CCM + . The numerical model is validated with the test data and the results show that the ridged structures can make the low-pressure area on the blade surface more dispersed and suppress cavitation. Compared with the prototype propeller, the four bionic propellers with the ridge structures can reduce the cavitation area by 26% (with an advance speed coefficient of 0.5) to 30% (with an advance speed coefficient of 0.3) at medium and low advance speeds. Besides, one of the bionic propellers can improve the thrust and efficiency by 14.93% and 1.61% respectively at high advance speeds.

随着船舶大型化、高速化的发展，船用螺旋桨的空化和辐射噪声越来越受到人们的关注。本文受到具有仿生脊表面的机翼的启发，对具有脊结构的船用螺旋桨进行了数值模拟。采用仿生方法重新设计船用螺旋桨叶截面，在前缘和最厚点之间设置脊状结构。通过改变桨叶表面脊线结构的样式和分布面积，建立了四个仿生螺旋桨。利用STAR CCM+软件对空化形态、压力分布和敞水特性进行了分析。结合试验数据对数值模型进行了验证，结果表明，脊状结构可以使叶片表面的低压区更加分散，抑制空化。与原型螺旋桨相比，四片脊状结构仿生螺旋桨在中低进速时，空化面积可减少26%（进速系数为0.5）~30%（进速系数为0.3）。此外，其中一款仿生螺旋桨在高推进速度下，推力和效率分别提高了14.93%和1.61%。