Model experiments on unconventional ducted propulsor without rotating blades

无旋转桨叶非常规导管推进器模型试验

• 批准号: 24656531
• 负责人: SUZUKI Kazuo
• 金额: $ 2.58万
• 依托单位: Yokohama National University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Challenging Exploratory Research
• 财政年份: 2012
• 资助国家: 日本
• 起止时间: 2012-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-24656531/
• 关键词: 推力発生装置; ダクト; 回転翼; ボス

A conventional screw propeller has large rotating blades to get effective thrust force, and the respective blades advance in water as screws. In the present study, an unconventional ducted propulsor is proposed. It has a duct, a rotating boss and vanes with screw surfaces installed on the duct inner surface. Viscous rotational flows caused by rotating motion of boss are curved by the vanes along the duct inner surface. According to this inner flow, suction flows at the front side and accelerated blowing flows at the rear side can be induced.Experimental studies on performances of this new propulsor are carried out. Original models and their improved models based on the various design parameters are investigated. As results of the experiments, thrust forces caused by the new propulsor are confirmed, however, propeller efficiencies are lower than those of conventional screw propeller. For this new type duct-shaped propulsor, more practical improvements will be expected.

传统的螺旋桨具有较大的旋转叶片以获得有效的推力，并且各个叶片在水中像螺旋一样前进。在本研究中，提出了一种非常规导管推进器。它有一个管道、一个旋转凸台和安装在管道内表面上的带有螺纹表面的叶片。由凸台的旋转运动引起的粘性旋转流被沿管道内表面的叶片弯曲。根据这种内部流动，可以引起前侧的吸入流和后侧的加速吹流。对这种新型推进器的性能进行了实验研究。研究了原始模型和基于各种设计参数的改进模型。实验结果证实了新型推进器产生的推力，但螺旋桨效率低于传统螺旋桨。对于这种新型导管型推进器，预计会有更多实用的改进。

项目成果

Proposal and Fundamental Experiments on Unconventional Ducted Propulsor without Rotating Blades

无旋转叶片非常规涵道推进器的方案与基础实验

• 发表时间: 2013
• 作者: 鈴木和夫;横田剛
• 通讯作者: 横田剛