尾附体与主体连接形式对尾流场不均匀度影响的PIV测试评估

PIV Estimation on the Nonuniform Wake Flow Causedby Different Junction Forms of Stern Appendages

本文依托CSSRC(中国船舶科学研究中心)中型拖曳水池环境下新建的大型PIV测试手段 ,对水下航行体五种细部变化的尾附体与主回转体连接形式的设计模型 ,进行了尾部区域流场定量测试分析。特别针对受到主要关注的推进器所在剖面的三向伴流场 ,借助流场不均匀度系数 ,给出了直观的定量评估。本文的工作表明 ,该大型PIV测试系统对细部流场结构的识别有着较大的潜力 ,研究结果对指导尾附体及推进器优化设计有重要参考价值。

The wake flow field around an under water revolution body were measured using the newbuilt towing PIV system in CSSRC, among which there are five different junction forms of the stem appendages. The nonuniformity coefficients were presented to estimate wake flow field at the propeller disk plane in three components. The results indicate the PIV system in CSSRC is able to discern the fine difference of flow structure, and can supply important information to guide the design of appendages and propeller.