Development of Marine Propellers with Improved Cavitation Performance

开发具有改进空化性能的船用螺旋桨

• 批准号: 59850074
• 负责人: KATO Hiroharu
• 金额: $ 9.02万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research
• 财政年份: 1984
• 资助国家: 日本
• 起止时间: 1984 至 1985
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-59850074/
• 关键词: Propeller; Cavitation; Surface Force; Erosion; Boundary Layer; 有限幅翼

New marine propellers with improved cavitation performance were developed by using two-dimensional foil section design theory and lifting surface theory. Moreover, both calculation and experiment on propeller boundary layer and finite-span foil were performed as related research. The following conclusions were obtained.1. In order to diminish cavity volume, propellers with flat pressure distribution were developed. The experiment using both the new and conventional MAU type propellers showed that cavity volume of the new propellers reduced to 1/2-1/3 of that of the MAU type one, and the fluctuating pressure became about half of that due to the MAU type one.2. Since the load distribution of the propellers with the above-mentioned pressure characteristics becomes higher in the aft part of the blade section, the thrust becomes lower than the calculation unless carefully designed.3. In order to stabilize sheet cavity, a propeller with triangular pressure distribution was developed when a M … More AU type propeller generates cloud cavitation. The cloud cavitation was not observed on the new propeller, and the paint test showed that the paint peeling off which was observed in thr case of the MAU type propeller was not observed.4. A calculation scheme where target pressure distribution can be realized with relatively high accuracy was developed.5. A theoretical calculation method of boundary layers on propeller blade was developed, using quasi-three-dimensional approximation. This method can be said very promising sinve the calculated results could show the difference of the propeller boundary layer characteristics observed in the experiment although quantitative agreement with the experiment is not sufficiently high in the present stage.6. Adequacy of the concept of equivalent two-dimensional foil was verified from theoretical calculations on various finite-span foils. Moreover, some simple equations were proposed in order to obtain modified equivalent two-dimensional foil whose thickness is reduced than that of the equivalent two-dimensional one so as to make the calculation accuracy higher. Less

应用二维翼型设计理论和升力面理论，研制了具有改善空泡性能的新型船用螺旋桨。此外，还对螺旋桨边界层和有限翼展翼型进行了计算和实验研究。得出以下结论：1.为了减小空泡体积，研制了压力分布平坦的螺旋桨。实验结果表明，新型螺旋桨的空泡容积仅为MAU型螺旋桨的1/2-1/3，脉动压力仅为MAU型螺旋桨的一半左右.由于具有上述压力特性的螺旋桨的载荷分布在桨叶截面的后部变得更高，除非仔细设计，否则推力将低于计算值.为了稳定片空泡，在M ...更多信息 Au型螺旋桨产生云空泡。在新螺旋桨上没有观察到云状空泡，油漆试验表明，在MAU型螺旋桨的情况下观察到的油漆剥落没有消失.提出了一种能够以较高精度实现目标压力分布的计算方案.本文采用准三元近似，建立了螺旋桨叶片边界层的理论计算方法。这种方法可以说是非常有前途的，因为计算结果可以显示出实验中观察到的螺旋桨边界层特性的差异，尽管目前与实验的定量一致性还不够高.通过对各种有限翼展翼型的理论计算，验证了等效二维翼型概念的正确性。提出了一些简单的计算公式，得到了厚度比二维等效翼型减小的修正二维等效翼型，从而提高了计算精度。少

项目成果

Proceedings of the International Symposium on Propeller and Cavitation, China. (1986)

中国螺旋桨与空化国际研讨会论文集。

Japan Ship Propulsion Committee in the Society of Naval Architects of Japan. 4. (1984)

日本造船学会日本船舶推进委员会。

西部造船会会報. (1986)

西方造船协会公报（1986）。

Proceedings of ISPC,China. (1986)

中国ISPC 论文集。

日本造船学会論文集. 158. (1985)

日本造船学会会刊 158。（1985 年）