基于熵产理论的组合节流槽滑阀结构优化设计OA

The structural parameters of the sliding valve with V+U combined throttle groove are optimized based on entropy production theory and response surface methodology,aiming to reduce energy loss in hydraulic systems and improve flow control performance.The numerical simulations are conducted to analyze entropy production distribution,velocity field and pressure field characteristics at different valve openings,with 40%opening being identified as the typical working condition.The Plackett-Burma test is used to screen the three key influencing factors that significantly affect total entropy production:U-groove length,V-groove depth and V-groove length.Regression equations between the three factors and total entropy production as well as flow gain are established using steepest ascent and response surface methodologies.The interaction effects of the influencing factors are analyzed to obtain the optimal structural parameter combination for the V+U combined throttle groove.The results show that when the U-groove length is 2.417 mm,the V-groove length is 1.899 mm and the V-groove depth is 0.916 mm,the total entropy production is reduced from 4590.39 mW/K before optimization to 793 mW/K.Meanwhile,the flow gain remains within a reasonable range,and the model prediction error is less than 5%.The conclusions provide theoretical reference for the study of energy loss in V+U combined throttle grooves.