串列水翼绕流非定常特征实验研究  

Experimental Study on the Unsteady Characteristics of Flow around Tandem Hydrofoils

作　　者：朱健申 王小静[1] 王宗龙 刘腾岩 ZHU Jianshen;WANG Xiaojing;WANG Zonglong;LIU Tengyan(School of Mechatronic Engineering and Automation,Shanghai University,Shanghai 200444,China;Marine Design and Research Institute of China,Shanghai 200023,China)

机构地区：[1]上海大学机电工程及自动化学院,上海200444 [2]中国船舶与海洋工程设计研究院,上海200023

出　　处：《实验室研究与探索》2023年第8期30-34,共5页Research and Exploration In Laboratory

摘　　要：为了研究亚临界雷诺数(Re=7×10^(4))下串列水翼尾缘表面压力和流场的非定常特征,运用时间解析图像粒子测速法(Tr-PIV)测量和分析串列上、下游水翼的尾流场,并采集上、下游水翼尾缘脉动压力,进行多间距比工况实验。研究结果表明,在串列水翼间距比P/C较小(0.1、0.157)的工况下,串列水翼间的平均流场呈多涡流态,其中P/C=0.1工况上游水翼尾缘脉动压力频谱出现多个峰值频率;随着P/C增大(0.3、0.457),水翼间平均流场呈单涡流态,上游水翼尾缘压力以单频率脉动。P/C=0.1工况水翼中间流场内多点流向速度脉动频率与上游水翼尾缘压力脉动频率相符;上、下游水翼尾缘存在共同脉动压力特征频率,相同流态下该频率随P/C增大而升高。实验结果可为水下部件的阵列布局提供一定的理论支撑。To study the unsteady characteristic of the pressure on trailing edge and flow field of tandem hydrofoils under the condition that Reynolds number is equal to 7×10^(4),time resolution-particle image velocimetry(Tr-PIV)method is utilized to test and analyze the flow field around trailing edges of both hydrofoils,and pressure fluctuation is tested near the tailing edge.Experiment on multiple spacing ratio condition is carried out.Experiment results show that multiple vortices between two hydrofoils are detected in the status that spacing ratio P/C=0.1 and 0.157 while multiple pressure fluctuation frequency is measured in P/C=0.1.Steady vortex shedding of the upper stream hydrofoil is shown with the increase of spacing ratio(P/C=0.3&0.457)in which one frequency characteristic of pressure fluctuation is found.Characteristics of fluctuation of velocity of several points in the flow field and match well.Two hydrofoils share the same characteristic frequency of pressure fluctuation near the trailing edge.The co-frequency and flow regime between two hydrofoils are related to P/C.The co-frequency near the trailing edge of both hydrofoils rises correspond to the increase of P/C in each flow regime.This research can provide theoretical support for the layout of structures under water.

关 键 词：非定常特征 串列水翼 脉动压力 间距比 图像粒子测速法 

分 类 号：O352[理学—流体力学]