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| Pressure shock of hydraulic excited piping study based on a lattice Boltzmann method |
| YUAN Xin1,WU Wanrong1,HAO Qianhua1,2 |
1.College of Mechanical and Electrical Engineering,Central South University,Changsha 410083,China；
2.School of Energy，Mechanical and Electrical Engineering，Hunan University of Humanities，Science and Technology,Loudi 417000，China |
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Abstract 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.
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Received: 07 July 2017
Published: 15 February 2019
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