Drag Reduction Optimization Method For Axial Flow Check Valve Channel Shape

In the context of the national west-east pipeline project,many domestic valve researchers and product manufacturers are committed to the domestication of valves,however,the domestication is still far from enough if it simply stays at the designing and manufacturing level.With the development of modern production technology;energy saving,high efficiency and other important economic indicators should also be considered in domestic valve products.For valves,the flow resistance coefficient is an important factor affecting their efficiency and performance.In this paper,the drag reduction optimization of axial flow check valve is researched,and a more effective idea and method is obtained,which can be used as a reference for other valve drag reduction optimization.The axial flow check valve is a kind of valve with special functions.It has been researched to reduce the flow resistance coefficient at home and abroad.However,some optimization methods have disadvantages such as methods complex,large amount of calculation,requirement of many experiments,or single optimization results.In order to solve these problems,this paper takes full advantage of computer virtual simulation technology,such as low cost,high calculation precision and fast speed.Combined with the flow resistance coefficient test,this study puts forward a simple,economical and diversified optimization method.We take the NPS10 Class1500 axial flow check valve of Chengdu Chenggao Valve Co.,Ltd as the research object,and reduce the flow resistance coefficient based on its original flow channel shape.To explain the whole optimization method,the specific optimization process and verification are listed as follows:(1)Firstly,a verified numerical simulation method of ANSYS Fluent for the flow resistance coefficient is established for the optimization method.We entrust National pump valve products quality supervision and inspection center of Hefei general mechanical and electrical product testing institute co.,LTD.,that is approved by the national review of the third party inspection,certification,and comprehensive reviews(check)institutions,to conduct the NPS10 Class1500 axial-flow check valve flow resistance coefficient experiment according to the flow resistance coefficient of valve test standards of the state.At the same time,a 1:1 model test system for numerical simulation of the flow resistance coefficient is established whose results are corrected by the test results.(2)Then,on the basis of the above,we parameterized the test model and used the response surface optimization method to optimize the flow resistance shape of the NPS10Class1500 axial flow check valve.Combined with the numerical simulation of the flow resistance coefficient of ANSYS Fluent,we obtained several sets of optimization results that satisfy the optimization objective.(3)Finally,we select five groups of optimization results that have the lowest flow resistance coefficient.After data integration considering the actual production and processing situations of the valve,the flow resistance coefficient was re-modeled and numerically simulated.The numerical simulation results show that the optimization results obtained by the optimization method proposed in this paper are precise enough.At the same time,we also extend the other attributes of the five groups of optimization results.In the actual application of optimization methods,designers can choose an appropriate optimization recommendation with respect to the specific design requirements.