Boundary Effects and Modeling Method of Large Field Space Flow Field Model in Hilly and Gully Region:A Case Study of a Specific Region in Yuncheng,Shanxi
Accurately simulating the airflow field at tower-line height of large field space in hilly and gully areas is key to studying the wind-induced vibration response and mechanical characteristics of high-voltage transmission lines and optimizing the tower-line coupling structure design,based on the relevant theory of computational fluid dynamics.However,due to the lack of systematic research on boundary effects,the simulation results of the flow field are not accurate or the model boundaries are excessively redundant and difficult to solve.In order to address this challenge,a typical region was modeled based on DEM data,and the influence of modeling methods and boundary effects on flow field simulation at specific height layers in complex terrain was systematically discussed through flow field simulation and boundary effect analysis.The results indicate that when the height of the calculation domain exceeds seven times the terrain height difference,the boundary effect is essentially eliminated.Furthermore,the distortion of the flow field caused by wall boundary constraints decreases as the redundant distance increases,with a redundant distance of 700 m being able to obtain a more stable wind field.It is concluded that the study effectively elucidates the impact of the calculation domain on the flow field and presents a method to mitigate the boundary effect of the fluid model.These findings hold valuable reference value for enhancing the stability and wind resistance of high-voltage transmission line structures.
large-fieldwind field simulationfluid mechanicsfinite element analysisboundary effectscalculation domain
万方数据
维普
