Research On The Characteristics Of Wake Disturbance In Side-by-side Movement Of People

With the development of the economy,people’s travel frequency is getting higher and higher.At the moment of frequent epidemics,people’s travel safety has been paid more and more attention.The static transmission range of the virus is limited,but largescale personnel activities will drive the virus to spread rapidly on a large scale.In transportation hubs such as high-speed railway stations and subway stations,the space is relatively closed,and the behavior of people is complex.Especially in the transfer passage,where people move on a large scale,the research on the movement of people is more and more urgent.In the current domestic and foreign research,only the movement of a single person is studied,and the disturbance effect of the movement of people in the narrow and long space on the flow field,the influence of parallel movement of people on the surrounding flow field,and the influence between people are not considered.have never been studied.Therefore,in this study,the parallel movement of personnel is studied,and the wake vortex structure and the disturbance to the surrounding flow field are the main research objects.In this study,the method of scaling experiment and computational fluid dynamics is used for simulation.For parallel personnel at different speeds V=0.5m/s and V=0.7m/s,the experiment is carried out with a scale of 1:8.The platform includes: a closed laboratory and a high-precision speed-regulated rail car.Simplify the human body and make a human model,and conduct experiments through the arrangement of experimental measurement points and reasonable measurement techniques.In terms of simulation,the four transition models of RNG k-ε,Realizable k-ε,DES,and SST are used to carry out,and are checked with the experiment.The results show that the RNG k-ε model has the best effect of checking with the experiment,and can reflect the parallelism more realistically.The disturbance effect of people’s movement on the surrounding flow field.In the calculation of the vortex structure,the Ω vortex structure identification method is used,and the vortex structure and velocity field are analyzed.The results show that: during the movement of people,affected by the disturbance of the movement of people,the velocity of the flow field around the human body increases,but the flow field The forward flow causes the pressure to drop.With the increase of the movement speed of the people,the velocity of the flow field around the human body increases,and the pressure decreases.The wake of the movement of people presents the characteristics of instability,and the rear wake oscillates with the passage of time.When the movement speed of people increases,the disturbance effect of the movement of people on the surrounding flow field is stronger,and the size of the wake vortex structure of the human body increases.