摘要
为了解决常用的经验公式法对流量特性的研究存在参数选择依赖个人经验,不易得到精确数学模型的问题,对基于超磁致驱动器(giant magnetostrictive actuator,GMA)的流量阀在开口范围里分别建立二维模型,进行网格划分,通过Fluent软件仿真计算,简便易行,准确可靠。得到阀口前后压差恒为2 Mpa时各模型的流量值;根据这些流量值,通过Matlab软件绘制出该阀的流量特性曲线,拟合出该曲线的数学方程;并结合圆锥缝隙流量公式,分析数值模拟的合理性,进而得到流量与GMA输出位移和压差关系精确的数学模型,为流量阀特性的检测提供了依据,并为该阀的精确控制打下了基础。
In order to solve the problem, the study by common empirical formula method on flow characteristics has the de- pendence on individual experience in the selection of parameters and is not easy to get accurate mathematical model. This paper establishes different models in the range of the valve opening size of the flow valve based on the giant magnetostrictive actuator （GMA） , meshes the models and calculates them by fluent, making the study simple, accurate and reliable. And it obtains the different flow values of the models when the differential pressure of the valve ports between the front and back are 2Mpa. Then according to these flow values,it protracts the flow characteristic curve by Matlab and fits the mathematical equation of the curve. At the same time, combining with the flow formula of conical gap, it analyzes the rationality of the numerical simulation. Furthermore, it obtains the accurate mathematical model of the relationship between flow rate and the output displacement of the GMA, as well as the differential pressure. These simulated results would provide the basis for the detection of the flow characteristics and lay a foundation for the accurate control of the valve.
出处
《重庆邮电大学学报（自然科学版）》
北大核心
2012年第4期512-517,共6页
Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)
基金
河南省重点科技攻关项目(112102210421)~~
关键词
超磁致驱动器
流量阀
流量特性
数值模拟
数学模型
giant magnetostrictive actuator
flow valve
flow characteristic
numerical simulation
mathematical model
