The Optimization Of Nozzle Structure In Hydraulic Jetting

In the process of hydraulic jetting,the nozzle is the core tool of the entire process,but now the conventional nozzles used in the construction site exsits a lot of issues such as easying to wear and perforating depth is not enough,one important reason is that a large part of energy loss happens in the access of nozzle.In this paper,the main research method is a numerical simulation analysis which is based in the advantages of using the computational fluid dynamics and the basic theory of hydraulic jet.Simulated objects is one of five and a half inch of spray gun that is commonly used in engineering,we set the overall length of nozzle 25 mm which is based on conditions in the field.By setting different nozzle parameters such as shrinkage Angle,length of horizontal section,then using numerical simulation to determine the optimal combination.After numerical simulation,we improve the design of nozzle inlet structure which was the optimal combination.Based on computational fluid dynamics and jet theory,we improve the geometric structure of the nozzle by adding a circular arc at the front of the entrance to the nozzle which formed a small piece of smooth transition section.By analysing the result we can know,the nozzle energy loss is smaller than the traditional nozzle,many parameters on the new nozzle have great improvement.In this paper,by improving the internal structure of the nozzle inlet,we reduced the nozzle energy loss coefficient.This improvement is usefull to promote the efficiency of the nozzle work and reduces the economic costs of high performance nozzle which has the higher practical value...