| 绕弹性水翼非定常空化流激振动特性研究 |
| |
| 引用本文： | 孟璐, 刘影, 黄彪, 高远, 吴钦. 绕弹性水翼非定常空化流激振动特性研究[J]. 工程力学, 2017, 34(8): 232-240. DOI: 10.6052/j.issn.1000-4750.2016.03.0205 |
| |
| 作者姓名： | 孟璐 刘影 黄彪 高远 吴钦 |
| |
| 作者单位： | 北京理工大学机械与车辆学院, 北京 100081 |
| |
| 基金项目： | 国家自然科学基金项目（51679005）；北京自然科学基金项目（3172029）；高等学校博士学科点专项科研基金项目（20131101120014） |
| |
| 摘 要： | 该文通过实验和数值计算相结合的方法，对弹性水翼非定常空化流激振动特性进行了研究。实验中，采用高速摄像机获取云状空化不同发展阶段的流动发展规律，应用激光测振仪测量弹性水翼的流激振动特性，通过同步测量技术获取水翼振动特性数据并结合空穴形态图对其进行分析，同时在实验结果基础上加入数值计算部分对流激振动特性进行进一步的说明。研究结果表明：云状空穴的发展为一个准周期过程，包括附着型空穴的生长、空穴的脉动以及空穴的脱落三个阶段；弹性水翼的振动主要受空穴发展过程的影响，因此流激振动特性呈现出周期性的变化过程，且弹性水翼振动主导频率为空穴脱落频率；在不同的空穴发展阶段，表现出不同流激振动特性，并且在空穴脉动和空泡脱落阶段水翼振动较为剧烈。
|
| 关 键 词： | 弹性水翼 云状空化 准周期 流激振动 频率 |
| 收稿时间： | 2016-03-22 |
| 修稿时间： | 2017-01-04 |
INVESTIGATION OF FLOW-INDUCED VIBRATION CHARACTERISTICS OF FLEXIBLE HYDROFOIL IN UNSTEADY CAVITATION |
| |
| MENG Lu, LIU Ying, HUANG Biao, GAO Yuan, WU Qin. INVESTIGATION OF FLOW-INDUCED VIBRATION CHARACTERISTICS OF FLEXIBLE HYDROFOIL IN UNSTEADY CAVITATION[J]. Engineering Mechanics, 2017, 34(8): 232-240. DOI: 10.6052/j.issn.1000-4750.2016.03.0205 |
| |
| Authors: | MENG Lu LIU Ying HUANG Biao GAO Yuan WU Qin |
| |
| Affiliation: | School of Mechanical Engineering, Beijing Institute of Technology, Beijing, 100081 China |
| |
| Abstract: | By combining the experimental studies carried out in a closed-loop cavitation tunnel and the numerical investigation of flow-induced vibration, the flow-induced vibration characteristics of a flexible hydrofoil in unsteady cavitation are investigated. A high-speed video camera is used to visualize the unsteady cavitating flow patterns, and a laser doppler is used to measure the flow-induced vibration characteristics of the flexible hydrofoil. A multi-field synchronous measuring system is used to measure the cavity shape and hydrofoil vibration. Based on the results of the experiment, further numerical study is performed. The results show that:the process of the flow-induced vibration characteristics is a quasi-periodic variation, and one cycle can be divided into three stages which are attached cavity development, cavity fluctuation and cavity shedding. The flow-induced vibration is mainly influenced by the development of the cavitation, and the main frequency is corresponding to the cavity shedding frequency. During the different process of the cavitation development, it shows the different variation characteristics, and the variation is fiercer during the stages of cavity fluctuation and cavity shedding. |
| |
| Keywords: | flexible hydrofoil cloud cavitation quasi-period flow-induced vibration frequency |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《工程力学》浏览原始摘要信息 |
|
点击此处可从《工程力学》下载全文 |
|
