Research On Simulation And Optimization Of Multi-Nozzle Layout Of Plane Cleaning Equipment

Multi nozzle plane cleaning equipment is one of the widely used technologies in water jet cleaning equipment.Compared with single nozzle cleaning equipment,the cleaning efficiency is higher,the cleaning effect is better,and the manpower and time are saved.Therefore,the research on the layout of multi-nozzle plane is very important.At present,most of the relevant researches focus on the optimization of process parameters of single nozzle,and the plane cleaning equipment usually uses multiple nozzle layout to clean parts.Therefore,this paper takes the plane layout of cylindrical nozzle and sector-shaped nozzle as the research object,and uses Creo 3.0,ANSYS Workbench 19.0 Fluent 19.0 and CFD post 19.0 have studied the cleaning process and layout of the software,which are more close to the actual production and have a certain practical application significance.In the simulation of multi nozzle cleaning process,three factors,i.e.nozzle layout(straight line-shaped and circle shaped multi-nozzle layout),nozzle shape(cylindrical nozzle and sector nozzle)and number of nozzles,are considered to simulate the multi-nozzle flow field,and the water jet velocity,average dynamic pressure and maximum dynamic pressure are obtained,and the volume fraction of water phase;Taking the number of nozzles,nozzle spacing and nozzle target distance as optimization variables and the better cleaning effect as optimization objective,the single objective and multi-objective optimization analysis are carried out by using orthogonal experimental optimization method,and the better parameter combination of cylindrical multi nozzle and sector-shaped multi-nozzle layout are obtained.The main factors affecting the cleaning effect are the number of nozzles,nozzle spacing and nozzle target distance.The optimization results show that the number of nozzles has the greatest impact on the cleaning effect,followed by the nozzle spacing,and the nozzle target distance has the lowest impact on the cleaning effect.The data of the average dynamic pressure,the maximum dynamic pressure and the average volume fraction of water phase on the target plate are processed dimensionless and calculated by weighted average,which are integrated into an evaluation system,namely the cleaning effect,so as to realize the multi-objective optimization.The results show that:(1)Optimal layout results of cylindrical multi nozzle with "straight line" is as follows that: the number of nozzles is 6,the distance between nozzles is16 mm,and the distance between nozzles is 90mm;(2)The results show that the optimal layout of sector-shaped multi nozzle with "straight line " layout is as follows that: the number of nozzles is 4,the distance between nozzles is 13 mm,and the distance between nozzles is 100mm;(3)Optimal layout results of cylindrical multi-nozzle with center shape is as follows that:the number of nozzles is 7,the distance between nozzles is 13 mm and the distance between nozzles is 110mm;(4)Optimal layout results of sector shaped multi-nozzle with center shaped is as follows that: the number of nozzles is 7,the distance between nozzles is 16 mm,and the distance between nozzles is 110 mm.Basically,the cleaning effect of the circular center layout is better than that of the "straight line" layout,and the cleaning effect of the cylindrical nozzle is better than that of the sector nozzle.However,different layouts can be selected according to different working conditions.The research results of this paper provide a certain reference basis for the study of multinozzle layout parameters,and a certain theoretical basis for the design and research of multinozzle cleaning equipment.