Design and Research of Propeller Based on Variable Pitch

被引：0
|
作者：
Zhang H. [1 ]
Chen D. [1 ]
Zhang Y. [1 ]
Liu J. [1 ]
机构：
[1] School of Mechanical Engineering, Tianjin University, Tianjin
来源：
Tianjin Daxue Xuebao (Ziran Kexue yu Gongcheng Jishu Ban)/Journal of Tianjin University Science and Technology | 2023年 / 56卷 / 08期
关键词：
computational fluid dynamics simulation; kinematics and dynamics; propeller; variable pitch;
D O I：
10.11784/tdxbz202205006
中图分类号：
学科分类号：
摘要：
A scheme of underwater robot propeller which used variable pitch to realize lateral force output is proposed. The propeller has a main thrust motor，a pitch control motor and a gearset inside，and the pitch control shaft is mounted coaxial with the propulsion spindle. By controlling the motor，the pitch angle of the blade can be controlled periodically to realize the lateral force output. The hydrodynamic characteristics of the propeller are studied by computational fluid dynamics(CFD)method，and the results show that the lateral force can be generated by using the rule of sine curve to control the change of pitch angle；the lateral force curve is circular under the polar coordinate of the propeller disk；the direction of average lateral force is consistent with the initial phase direction of variable pitch；and when the pitch angle change amplitude is 9°，the average lateral force generated is about 40 N. In addition，the relationship between the lateral force，thrust，and the amplitude of pitch angle change，the rotation speed is also simulated. The results show that when the pitch angle change adopts a sine curve，the average lateral force generated by the propeller is proportional to the pitch angle change amplitude and the square of the rotational speed；and the generated average thrust is not greatly affected by the amplitude of the pitch angle change，which is proportional to the square of the speed. The simulation results are applied to the autonomous underwater vehicle(AUV)dynamics model to verify the control of the AUV equipped with this propeller. The calculation results show that the AUV using this propeller can achieve good maneuvering effects when diving，floating underwater and turning horizontally. Compared with the traditional propeller＋rudder control mode，the structure is simple，the number of motors is reduced，and the utilization rate of AUV stern space is improved. Compared with the existing vector propulsion scheme，variable pitch propeller has the advantages of simple structure，high reliability and good lateral force controllability. Bench test shows that this variable pitch principle can realize the periodic adjustment of blade pitch and can be used to realize the vector propulsion of AUV platform. © 2023 Tianjin University. All rights reserved.
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页码：775 / 784
页数：9
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