基于熵产理论和响应面法的轴流式止回阀结构优化设计  

Optimization design of axial flow check valve structure based on entropy production theory and response surface methodology

作　　者：李金铭 邹淑云[1] 刘忠[1] 喻哲钦 李志鹏[1] 邵建农 LI Jinming;ZOU Shuyun;LIU Zhong;YU Zheqin;LI Zhipeng;SHAO Jiannong(School of Energy and Power Engineering,Changsha University of Science and Technology,Changsha 410114,China;Yuanda Valve Group Limited Company,Xingtai 055350,China)

机构地区：[1]长沙理工大学能源与动力工程学院,长沙410114 [2]远大阀门集团有限公司,河北邢台055350

出　　处：《流体机械》2023年第7期68-75,98,共9页Fluid Machinery

基　　金：湖南省自然科学基金项目(2022JJ40504);湖南省教育厅自然科学研究项目(21C0206);湖南省研究生科研创新项目(QL20210203)。

摘　　要：为了优化轴流式止回阀结构,从而提高其流通性能,提出了一种基于熵产理论结合响应面法的轴流式止回阀结构优化设计方法,并对DN100轴流式止回阀进行了优化设计和分析。以最小熵产为目标,采用Plackett-Burman试验、最陡爬坡试验和Box-Behnken响应面试验得到最优结构参数,并对优化前后轴流式止回阀进行熵产和流场分析。结果表明:最优结构参数为入口角33.4°、阀瓣宽24.4 mm和阀芯尾角25.0°,响应面法预测准确且优化效果显著。湍流耗散熵产是造成轴流式止回阀能耗较大的主要原因,其主要发生在喉口后端和阀瓣边缘附近,优化后其数值大小和分布范围明显减小。优化前轴流式止回阀喉口后端、阀瓣边缘处和阀芯尾部存在较多漩涡,优化后漩涡显著减少,阀芯上分离点明显后移,流通性能更好。本研究为轴流式止回阀结构优化设计提供了新思路。In order to optimize the structure of axial flow check valve and improve its flow performance,an optimization design method of axial flow check valve structure based on entropy production theory combined with response surface methodology was proposed,and the optimization design and analysis of DN100 axial flow check valve were implemented.With the minimum entropy production as the objective,the optimal structural parameters were obtained by the Plackett-Burman design,the path of steepest ascent design and the Box-Behnken design,and the entropy production and flow field analysis of the optimized and original axial flow check valves were performed.The results show that the optimal structural parameters are an inlet angle of 33.4°,a valve flap width of 24.4 mm,and a spool tail angle of 25.0°,and the response surface methodology has accurate prediction and significant optimization.The entropy production by turbulent dissipation is the main cause for the large energy consumption of the axial flow check valve,which mainly occurs near the rear end of the throat and the edge of the valve flap,and its numerical size and distribution range are obviously reduced after optimization.There are more vortexes at the rear end of the throat,at the edge of the valve flap and at the tail of the spool of the original axial flow check valve,and after optimization,the vortex was significantly reduced,the separation point on the spool obviously moved backward,and the flow performance was improved.This research provides a new idea for the optimization design of axial flow check valve.

关 键 词：轴流式止回阀 熵产理论 响应面法 优化设计 数值模拟 

分 类 号：TH137[机械工程—机械制造及自动化]