基于熵值分析的节流阀口节流特性  

Study on throttle performance of throttling orifice based on entropy analysis

作　　者：袁士豪[1] 楼盼龙[1] 吕剑昊[1] 

机构地区：[1]杭州杭氧股份有限公司,浙江杭州310014

出　　处：《排灌机械工程学报》2015年第1期61-66,共6页Journal of Drainage and Irrigation Machinery Engineering

基　　金：国家自然科学基金资助项目(50875122);江苏省科技支撑计划项目(BE2011187)

摘　　要：分析V型节流阀口的结构特点,研究了其节流特性.在V型节流阀口节流公式的基础上提出了用于衡量V型阀口节流特性优劣的4个评价指标:节流阀口等效水力直径曲线的斜率dV2,节流阀口等效过流截面面积的数值比k,较小过流截面A2A的空化指数σ2A1in和σ2A1out.为了优化V型节流阀口的节流特性,设计了V型节流阀口结构参数的均匀试验样本,计算了16组不同阀口结构的节流特性评价指标.将熵值分析手段引入到V型节流阀口节流特性的研究中,并研究V型节流阀口的节流结构参数对节流特性的影响,结合V型节流阀口结构参数的均匀试验样本,利用熵值分析得到了使V型节流阀口具有局部较优节流特性的阀口结构参数.对比V型节流阀口的初始结构节流特性和优化后结构节流特性,发现优化后V型节流阀口结构的节流特性得到了提高.The structural characteristics of a V-shaped throttling orifice are analyzed to evaluate its throttle performance.In doing so,four performance indices are proposed,namely the slope of equivalent hydraulic diameter,dV2,ratio of equivalent throttling section areas,k,cavitation numbers,σ2A1in and σ2A1outat the smallest throttling section A2 A.Homogeneous design is introduced into the structural design of V-shaped throttling orifice,and then the values of four evaluation indices of 16 design cases are calculated.Entropy analysis is applied into the study on throttle performance of these orifices,and then the orifice structure is optimized to achieve the best throttle performance.Compared with the initial structure of the orifice,the optimized one has an improved throttle performance.

关 键 词：阀口结构 节流特性 评价指标 均匀设计 熵值分析 

分 类 号：S277.9[农业科学—农业水土工程] TH137.52[农业科学—农业工程]