摘要
为研究液压激振管道的压力冲击问题,引入一种基于介观粒子的格子Boltzmann方法,建立液压激振管道的多松弛格子演化模型,模拟阀门关闭引起的管道压力冲击;在不同阀门关闭时间、不同流速变化条件下,分析管道压力冲击的变化规律以及管道中速度场对压力的影响。仿真分析结果表明:关阀时间与管道压力波周期的关系是影响管道压力冲击的根本原因;通过与传统有限体积法的模拟结果进行对比,得出格子Boltzmann方法能较好地模拟液压激振中管道的压力冲击,与传统方法模拟结果有较好的一致性,且格子方法的运算效率更高;速度场的分析表明,速度瞬变是压力瞬变的根本原因。两种分析方法对比表明,格子Boltzmann方法方法具有易于编程实现、计算效率高等特点,可以应用于复杂液压激振系统的分析研究。
In order to study the hydraulic vibration pipeline problem,a multi-relaxation-time lattice Boltzmann method was introduced based on the dynamic theory of mesoscopic particles.A multi-relaxation lattice evolution model was estabilished for hydraulic excited pipes.Pipe pressure shock caused by valve closing was simulated.Under the condition of different valve closing time and different flow velocities,the change law of pipeline pressure shock and the influence of velocity field on pressure were analyzed.The results show that the relationship between the time of closing valve and the period of pressure wave is the root cause of the pipeline pressure shock.By comparison with the simulation results of the traditional finite volume method,it is found that the Littice Boltzmann method can simulate the pressure shock phenomenon in hydraulic exciting pipe,and the results are in good agreement with the results of the traditional method and the operation efficiency is obviously higher.Analysis of the velocity field shows that velocity transients are the root cause of the pressure transients.The comparison of the two analysis methods shows that the lattice Boltzmann method has the advantages of easy programming and high computational efficiency and so on,thus can be applied to the analysis and research of a complex hydraulic exciting system.
作者
袁鑫
吴万荣
郝前华
YUAN Xin;WU Wanrong;HAO Qianhua(College of Mechanical and Electrical Engineering,Central South University,Changsha 410083,China;School of Energy,Mechanical and Electrical Engineering,Hunan University of Humanities,Science and Technology,Loudi 417000,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2019年第4期250-257,共8页
Journal of Vibration and Shock
基金
国家自然科学基金(51774340)
高性能复杂制造国家重点实验室资助项目(ZZYJKT2015-03)
湖南省教育厅科学研究项目(16C0832)
关键词
液压激振
格子BOLTZMANN方法
多松弛
管道
压力冲击
速度场
hydraulic excitation
lattice Boltzmann method
multi-relaxation-time
pipeline
pressure shock
velocity field
