A study on the numerical cavitation tunnel

数值空化隧道研究

• 批准号: 18560763
• 负责人: MAEDA Masatsugu
• 金额: $ 2.41万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2006
• 资助国家: 日本
• 起止时间: 2006 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18560763/
• 关键词: Propeller; Cavitation; Pressure fluctuation; 格子生成方; 数値キャビテーションタンネル; プロペラキャビテーション; プロペラ形状; k-w乱流モデル; k-w-SST乱流モデル; クラウドキャビテーション

Estimation of the hull surface pressure fluctuation due to propeller cavitation is important in the design procedure of a ship. In this research project, we aim at predicting this hull surface pressure fluctuation through numerical simulation using a cavitation model.We have carried out simulation for a combined system of a ship hull and propeller in order to model the interaction between the hull and propeller more accurately. A good quantitative agreement with the experiment was obtained for non-cavitating condition. Also for cavitating cases a good qualitative agreement was obtained. However, the quantitative agreement was not as good as for the non-cavitating condition. The predicted magnitude of the pressure fluctuation at the blade frequency was about 60% of the measured value in the experiment, while higher frequency components predicted in the simulation were much smaller than that. Those high frequency fluctuation is induced by complex phenomena such as collapse of crowd cavity or bursting of tip vortex cavitation. Because those phenomena are not modeled in the present cavitation, high frequency fluctuation was not reproduced in the simulation. Nevertheless, this was the first attempt to predict the hull surface pressure fluctuation directly by CFD, and has an impact on the related research community.

在船舶的设计过程中，由于螺旋桨空化引起的船体表面压力波动的估计很重要。在该研究项目中，我们旨在通过使用空化模型通过数值模拟来预测这种船体表面压力波动。我们已经对船体和螺旋桨组合系统进行了模拟，以更准确地对船体和螺旋桨之间的相互作用进行建模。对于非浪费条件，获得了与实验的良好定量一致性。同样为了使案例备受良好的定性协议。但是，定量一致性不如非浪费条件那样好。在叶片频率下的压力波动的预测幅度约为实验中测量值的60％，而模拟中预测的较高频率成分远小于该值。这些高频波动是由复杂的现象引起的，例如人群腔塌陷或尖端涡流气腔爆发。由于这些现象不是在当前的空化中建模的，因此在模拟中未重现高频波动。然而，这是直接通过CFD预测船体表面压力波动的第一次尝试，并对相关研究界产生了影响。

项目成果

プロペラキャビテーションによる船体表面圧力変動の数値シミュレーションに基づく予測

基于螺旋桨空泡引起的船体表面压力脉动数值模拟的预测

• 发表时间: 2008
• 期刊: 日本船舶海洋工学会講演会論文集 第6号(掲載確定)(印刷中)
• 作者: 川村隆文;清川哲之介
• 通讯作者: 清川哲之介

気泡流中のプロペラの数値シュミュレーション

气泡流中螺旋桨的数值模拟

• 发表时间: 2007
• 期刊: 日本船舶海洋工学会講演会論文集 第4号
• 作者: Takafumi Kawamura;Atsuki Ito;Hajime Yamaguchi;Munehiko Hinatsu;川村隆文・伊藤淳揮・山口一・日夏宗
• 通讯作者: 川村隆文・伊藤淳揮・山口一・日夏宗

Numerical Prediction of Hull Surface Pressure Fluctuation due to Propeller Cavitation

螺旋桨空化引起的船体表面压力脉动的数值预测

• 发表时间: 2008
• 期刊: Conference Proceedings, The Japan Society of Naval Architects and Ocean Engineers Vol.6
• 作者: Takafumi Kawamura;Tetsunosuke Kiyokawa
• 通讯作者: Tetsunosuke Kiyokawa

Akihiko Fujii, Koyu Kimura, and Tadashi Taketani

藤井明彦、木村晃佑、竹谷正

• 发表时间: 2006
• 期刊: Sixth International Symposium on Cavitation, CAV2006, Wageningen, The Netherlands
• 作者: Takafumi Kawamura;Yoshihisa Takekoshi;Hajime Yamaguchi;Tsuyoshi Minowa;Masatsugu Maeda
• 通讯作者: Masatsugu Maeda

RANSを用いた舶用プロペラ周りに発生する非定常キャビテーションの数値シミュレーション、キャビテーションに関するシンポジウム

使用 RANS 对船用螺旋桨周围发生的非定常空化进行数值模拟，空化研讨会

• 发表时间: 2006
• 期刊: (第13回)講演論文集
• 作者: 川村隆文;竹腰善久;伊藤淳揮;箕輪剛;橋本崇史;前田正二;山口一;他
• 通讯作者: 他