Development of Front Wheel to Improve Propulsive Performance of Ship

开发前轮提高船舶推进性能

• 批准号: 10555343
• 负责人: NAKATAKE Kuniharu
• 金额: $ 5.82万
• 依托单位: KYUSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B).
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-10555343/
• 关键词: Ship; Front Wheel; Improvement; Propulsive Performance; 厚翼性能解析

We aimed to develop a front wheel (F.W) which improves the propulsive performance of ship. Research results are as follows :(1) We made 22 F.Ws with different number of blades, diameters and pitches, and performed the interaction experiments among a propeller and F.Ws in a circulating water channel. From these tests, we understand that we can not improve the propulsive performance of the system with F.Ws rotating contrary to propeller rotation.(2) We measured the velocity field behind a working propeller, and confirmed that the flow behind a freely rotating propeller was retarded and it increased the thrust of a propeller set behind the front propeller.(3) We made 4F.Ws with 8 blades and 24cm diameter, i.e. two flat plate F.Ws (F60 and F65) and two constant pitch F.Ws (C60 and C65), and performed the interaction experiments among the propeller MP.261 (diameter 24.08cm) and F.Ws. Due to counter rotation of F.W against the propeller, the performance of the system was not improved.(4) In … More a cavitation tunnel, we did the interaction experiments among propellers (MP.105 and 261) and F65 and also between propeller MP.262 and C60. Then the counter rotating systems (F65 + MP.105 and F65 + MP.261) decreased the efficiency of the systems. On the contrary, the efficiency of the same rotation system (C60 + MP.262) was unchanged compared with the open water characteristics of MP.262. As to the cavitation, we confirmed that F.W could fairly decrease the cavitating area on the propeller blade in uniform flow.(5) We conducted the self-proptulsion test of a large ship model (length 6m) with C60 and MP.262, and analyzed the test results based on the open-water characteristics of the system (C60 + MP.262) and confirmed the improvement of propulsive performance due to F.W at two speeds.(6) By using small Wigley model (length 2.5m) and 6 flat plate F.Ws (diameter 10cm, 8 blades), we performed the load varying tests and analyzed the propulsive performance and confirmed the propulsive efficiency increased only in case of same rotation system.(7) After making a computer code to calculate the propulsive performance of ship with F.W, propeller and rudder, we made clear the mechanism of interactions among them. Less

我们的目标是开发一种能提高船舶推进性能的前轮。研究结果如下：(1)我们制作了22f。不同叶片数、直径和节距的涡扇，在循环水通道中进行了螺旋桨与涡扇的相互作用实验。从这些试验中，我们了解到，我们不能提高系统的推进性能，f.w旋转与螺旋桨旋转相反。(2)我们测量了一个工作的螺旋桨后的速度场，证实了自由旋转的螺旋桨后的流动被阻滞，并增加了前螺旋桨后的一组螺旋桨的推力。我们做了4F。选取直径为24cm的8片桨叶w，即2个平板w （F60和F65）和2个定螺距w (C60和C65)，进行螺旋桨MP.261（直径24.08cm）与w的相互作用实验。由于F.W对螺旋桨的反向旋转，系统的性能没有得到改善。(4)在空化隧道中，分别进行了螺旋桨MP.105和261与F65以及螺旋桨MP.262与C60的相互作用实验。F65 + MP.105和F65 + MP.261对旋体系降低了体系的效率。相反，相同旋转体系（C60 + MP.262）的效率与MP.262的开水特性相比没有变化。在空化方面，我们证实了在均匀流动情况下，F.W能较好地减小螺旋桨叶片上的空化面积。(5)使用C60和MP.262对大型船模（长度6m）进行了自推进试验，并根据系统（C60 + MP.262）的开放水域特性对试验结果进行了分析，确认了两种航速下F.W对推进性能的改善。(6)采用小型Wigley模型（长度2.5m）和6台平板f.w（直径10cm， 8片叶片），进行了载荷变化试验，分析了推进性能，证实了只有在相同的旋转系统下，推进效率才会提高。(7)编制了水轮机、螺旋桨、方向舵船舶推进性能计算的计算机代码，明确了水轮机、螺旋桨、方向舵三者相互作用的机理。少

项目成果

M.Tamashima, and Others: "Numerical Simulation of Two-Dimensional Corner Flows in a Circulating Water Channel with Guide Vanes"T.of West-Japan Soc.of Naval Architects. 96. 39-48 (1998)

M.Tamashima等人：“带导向叶片的循环水道中二维角流的数值模拟”T.of West-Japan Soc.of Naval Architects。

K. Nakatake, J. Ando: "Prediction of Forces Acting on Ship with Different Afterbody Shapes in Oblique Towing" Symp. on Forces Acting on a Manoeuvring Vessel. 207-212 (1998)

K. Nakatake、J. Ando：“倾斜拖曳中不同尾部形状的船舶上作用力的预测”Symp。

J.Ando, and K.Nakatake: "A New Surface Panel Method to Predict Steady and Unsteady Characteristics of Marine Propeller"Proc.of 22nd Symp.on Naval Hydrodynamics. 22. 126-138 (1998)

J.Ando 和 K.Nakatake：“一种预测船用螺旋桨稳态和非稳态特性的新表面面板方法”Proc.of 22nd Symp.on Naval Hydrodynamics。

Y.Ukon, and Others: "Experimental Evaluation of Trans-Cavitating Propellers"Journal of Soc.of Naval Architects of Japan. 186. 51-58 (1999)

Y.Ukon等人：“跨空泡螺旋桨的实验评估”日本造船学会杂志。

右近良孝 他: "SCP理論設計法の実機プロペラへの応用"西部造船会会報. 100. 133-143 (2000)

Yoshitaka Ukon 等人：“SCP 理论设计方法在实际螺旋桨中的应用”西方造船工程师协会公报 100. 133-143 (2000)。