Research and Optimization Design of Flow Resistance Characteristics of Labyrinth Channel
The design of flow resistance characteristics of labyrinth channel is the key to achieving throttling and pressure reduction in labyrinth adjusting valve.However,the structure of the labyrinth channel is complex,and particle in the fluid can easily lead to clogging of the channel,affecting the throttling and pressure reducing performance.The flow resistance and anti-clogging performance of channels are studied,and the flow field and particle transport laws of different channels are analyzed.The Tesla-shaped is selected as the basic maze channel structure.Through orthogonal experimental design,the relationship between the structure parameters of Tesla-shaped channel and flow resistance coefficient and particle passing time is elucidated,and a multiple nonlinear regression model is established.Multi-objective optimization algorithm based on NSGA-Ⅱ is used and the optimization design of labyrinth channel with high flow resistance and low clogging rate is carried out with the maximum flow resistance coefficient and the minimum particle passing time as the optimization objectives.The results show that reducing the width and depth of the Tesla-shaped channel can increase the flow resistance coefficient,reducing the length of the outlet section can decrease the particle passing time.After optimization,the flow resistance coefficient of the Tesla-shaped channel is increased by 55.3％,and the particle passing time is decreased by 1.58％,effectively improving the flow resistance characteristics and anti-clogging performance.
万方数据
维普
