摘要
针对非定常空化流动及其诱导振动特性,从试验和数值计算等方面进行了总结。在空化流动的实验技术方面,详细评述了由单一测量到多场同步测量的发展,指出实现结构和空化流动的多场同步精细测量是试验技术的发展方向。对近年来发展的非定常空化数值模拟方法进行了总结,认为机器学习与计算流体动力学(CFD)的结合将是非定常空化流动和空化流激振动数值模拟方法发展的方向之一。通过对空化流激振动特性的试验与数值模拟研究结果的分析和总结,认为空化发展过程的强烈不稳定行为是影响结构动态振动响应特性的主要因素,通过X射线等技术深入分析空化区域内的回射流与冲击波演化特征,并结合精细化结构振动测试技术,将是今后进一步研究空化流动机理、理解非定常空化流激振动特性的重要关注点。
Physical and numerical investigation of cavitating flow-induced vibration has been reviewed.With the improvement of the experimental measurement technique,the multi-field synchronous measurement combining the high-speed visualization and unsteady vibration measurement will be one of the future directions of experimental investigation.Numerical simulation methods for the unsteady cavitating flow have also been summarized,and the combination of the Computational Fluid Dynamics and the machine learning will bring the further improvement of the numerical simulation work for the cavitating flow-induced vibrations.Study on the evolution of the cavitation behaviors and corresponding cavitating flow-induced vibration has been reviewed.The transient cavitation development strongly affects the structural dynamic responses.In the future,the X ray may help to further investigate the unsteady cavitation behaviors,such as the re-entrant jet and shock wave induced cavity shedding,and the unsteady cavitating flow mechanism and cavitation-structure interaction will be further revealed.
作者
吴钦
郭一梦
刘韵晴
王国玉
WU Qin;GUO Yimeng;LIU Yunqing;WANG Guoyu(School of Mechanical Engineering,Beijing Institute of Technology,Beijing 100081,China)
出处
《空气动力学学报》
CSCD
北大核心
2020年第4期746-760,I0003,共16页
Acta Aerodynamica Sinica
基金
国家自然科学基金(51839001,51909002)
北京市自然科学基金(3204056)
流体机械及工程四川省重点实验室(西华大学)开放课题(szjj2019-024)。
关键词
非定常空化
空化流激振动
空化流动机理
试验测试技术
数值模拟
unsteady cavitation
cavitating flow-induced vibration
cavitating flow mechanism
experimental measurement
numerical simulation
