CFD Simulation Of Wind Induced Interference Effects Of Opening Round Coal Bunker

Large span spherical coal bunker and a large space compared to other buildings,structural features low,the spherical shell structure belonging to the network shell,wind loads on their sensitive."Building structure Load Code" clearly specifically gives the general form of common building wind load design parameters.But for such a large body mass,shape complex buildings,due to their unique structure itself plus around such buildings often have the same volume of large buildings,which changes its flow field is more complex,specification Unable to clear specifically gives the corresponding design data,but it is supposed to determine the pressure distribution coefficient of its surface by wind tunnel experiments.Wind tunnel experiment is to obtain pressure distribution methods structure of one of the most direct and effective way,but the drawback is consumed enormous human and material resources,cost cost,long test cycle,poor repeatability.CFD numerical simulation of wind tunnel technology in the selected aspects of the calculation method and the turbulence model matures.Previous studies have spherical lattice shell dome or closed coal distribution warehouse pressure the whole,the lack of relevant research has openings for pressure distribution and bunker has a plurality of openings bunker wind-induced interference effects,from practical engineering point of view,in consideration of the design of the bridge openings and openings,open hole bunker model closer to building entity,the distribution of pressure on its surface is more complex than closed coal bunker,it is necessary for this research to identify wind pressure distribution law.Based on this,using FLUENT software and computational fluid dynamics(CFD)technology,based on the use of SST ??-turbulence model,outside the hole bunker wind load distribution of numerical wind tunnel calculations.It analyzes the pressure distribution of the bridge openings and openings around the single-bin trestle different hole size;Contrast Mono positions open hole in the wind at different wind angles induced interference effects;research changes the relative position of two-compartment pressure distribution of the victim and to change positions open hole mesh shell span ratio to the flow velocity,the overall height and the wind angle pressure distribution under the net shell surface to obtain this type of open hole bunker trestle optimum hole size is 4m × 4m,provide the basis for future open hole bunker design;Two bunker significant wind-induced interference effects,shielding effect around the bunker is very obvious;double warehouse trestle hole most unfavorable position of 10 °,in a dual compartment design selection should try to avoid such a positional relationship;Span ratio,wind angle and radius of the spherical shell surface pressure distribution network a greater impact;Fast and accurate net results for the shell surface pressure coefficient,proposed a two-dimensional geometric plane fitting method pressure coefficient distributions and draw fitting formula,to be veried that this formula is accurate.