﻿ 基于CFD扇翼推进器敞水性能预报分析
 舰船科学技术  2021, Vol. 43 Issue (12): 94-98    DOI: 10.3404/j.issn.1672-7649.2021.12.017 PDF

1. 中国船舶科学研究中心，江苏 无锡 214082;
2. 深海载人装备国家重点实验室，江苏 无锡 214082

Forecast analysis on open water performance of fanwing propeller based on CFD
LIU Le1,2, QU Ji-dong1,2, XING Fu1,2, ZHENG Zhi-heng1,2
1. China Ship Scientific Research Center, Wuxi 214082, China;
2. State Key Laboratory of Deep-sea Manned Vehicles, Wuxi 214082, China
Abstract: To solve the problem of the existing underwater submersible, for example, complex system composition and difficult to search after loss, drawing onthe concept of fanwing aircraft, a new concept of fanwing-propelling underwater submersible is proposed to make up for the deficiency of existing underwater submersible. Aiming at the open water performance problem of fanwing propeller which is the core device of fanwing-propelling underwater submersible, CFD method is used to compare and analyze the open water efficiency of the fanwing propeller and the tiltable duct propeller which produce the same negative lift and thrust under the condition of constant depth direct flights at a certain inflow velocity. The results show that the open water efficiency of the fanwing propeller is much higher than that of the tiltable duct propeller when it is applied to the underwater submersible with high lift-thrust ratio, which proves the feasibility of conceptual plan of the fanwing-propelling underwater submersible to a certain extent.
Key words: fanwing propeller     open water efficiency     negative lift     thrust     lift-thrust ratio
0 引　言

1 数值模拟 1.1 计算模型介绍

 图 1 扇翼推进器几何示意图 Fig. 1 Geometric diagram of the fanwing propeller

 图 2 可倾斜轴导管桨几何示意图 Fig. 2 Geometric diagram of the tiltable duct propeller

 图 3 可倾斜轴导管桨模型 Fig. 3 Geometrical model of thetiltableduct propeller

1.2 CFD计算原理

 $\frac{\partial {u}_{i}}{\partial {x}_{i}}=0 \text{，}$ (1)

RANS方程具体形式如下：

 $\frac{{\partial u}_{i}}{\partial t}+\frac{\partial }{\partial {x}_{j}}\left({u}_{i}{u}_{j}\right)=-\frac{1}{\rho }\frac{\partial p}{\partial {x}_{i}}+{S}_{i}+\frac{1}{\rho }\frac{\partial }{\partial {x}_{j}}\left(\mu \frac{\partial {u}_{i}}{\partial {x}_{j}}-\rho \overline{{u}_{i}{\text{′}}{u}_{j}{\text{′}}}\right) \text{。}$ (2)

1.3 扇翼推进器计算域设置及网格划分

1.4 可倾斜轴导管桨计算域设置及网格划分

2 扇翼推进器敞水性能分析 2.1 定深直航工况下扇翼推进器的敞水效率

 ${C}_{L}=\frac{L}{0.5\rho {V}^{2}S} \text{，}$ (3)
 ${C}_{T}=\frac{T}{0.5\rho {V}^{2}S} \text{，}$ (4)
 $\mathrm{\eta }=\frac{TV}{2\text{π} NQ} \text{。}$ (5)

 图 4 扇翼推进器力系数随转速变化曲线 Fig. 4 The curve that force coefficient of the fanwing propeller varies to rotate speed

 图 5 扇翼推进器升推比随转速变化曲线 Fig. 5 The curve that lift-thrust ratio of the fanwing propeller varies to rotate speed

 图 6 扇翼推进器敞水效率随升推比变化曲线 Fig. 6 The curve that open water efficiency of fanwing propeller varies to lift-thrust ratio
2.2 定深直航工况下可倾斜轴导管桨的敞水效率

 ${C}_{L}=\frac{L}{\rho {n}^{2}{D}^{4}} \text{，}$ (7)
 ${C}_{T}=\frac{T}{\rho {n}^{2}{D}^{4}}\text{，}$ (8)
 $\mathrm{\eta }=\frac{TV}{2\text{π} nQ} \text{。}$ (9)

 图 7 可倾斜轴导管桨力系数随γ的变化曲线 Fig. 7 The curve that force coefficient of the tiltable duct propeller varies to rotate speed

 图 8 可倾斜轴导管桨升推比随γ的变化曲线 Fig. 8 The curve that lift-thrust ratio of the tiltable duct propeller varies to rotate speed

 图 9 可倾斜轴导管桨敞水效率随升推比的变化曲线 Fig. 9 The curve that open water efficiency of the tiltable duct propeller varies to lift-thrust ratio
2.3 定深直航工况下两种推进器敞水效率对比分析

 图 10 两种推进器敞水效率对比曲线 Fig. 10 Comparison curve of open water efficiency of the two propellers

3 结　语

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