• 学报（中文） •

### 自然通气状态下半浸桨水动力特性数值分析

1. 1. 上海交通大学 船舶海洋与建筑工程学院， 上海 200240； 2. 哈尔滨工程大学 船舶工程学院， 哈尔滨 150001
• 通讯作者: 任振(1990-)，男，河南省商丘市人，博士生，研究方向为新型推进器及船舶节能装置.通信作者：王超(联系人)，男，副教授，电话(Tel.): 0451-82568486; E-mail: wangchao806@hrbeu.edu.cn.
• 基金资助:
国家自然科学基金(51679051)，国防基础科研计划(JCKY2016604B001)

### Numerical Analysis of Hydrodynamic Characteristics of Surface Piercing Propeller Under Naturally Ventilated Condition

REN Zhen,WANG Chao,WAN Decheng,YUAN Yuming

1. 1. School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; 2. College of Shipbuilding Engineering, Harbin Engineering University, Harbin 150001, China

Abstract: To study the hydrodynamic characteristics of surface piercing propeller under natural ventilation condition, the numerical simulation on the unsteady gas-liquid two-phase flow field of the standard model 841B was performed by solving RANS equation and combining it with the VOF method and using sliding mesh technique. The results show that the calculated values of thrust coefficient KT and torque coefficient 10KQ are in good agreement with the experimental data; especially near the design point, the errors of both are within 5%. The air cavity develops downstream in spirals in the wake field; the diameter of the spiral first increases and then decreases; finally, the spiral cavity gradually disappears. The forces/moments acting on the surface piercing propeller under small immersion condition are very large in horizontal and vertical directions. The wake flow field of surface piercing propeller is bounded by the free surface. The velocity in the wake field mutates in the free surface. In front of the disk, surface piercing propeller affects the flow field by suction effect; whereas the slipstream effect dominates the flow field behind the disk.