分布参数热流体系统的面向对象建模研究  

Object-Oriented Modeling for Distribution Parameter Thermo-Fluid System

作　　者：刘炜[1] 陈立平[1] 朱明清[1] 

机构地区：[1]华中科技大学机械科学与工程学院,湖北武汉430074

出　　处：《计算机仿真》2015年第11期229-233,共5页Computer Simulation

基　　金：国家高技术研究发展计划资助项目(2013AA041301)

摘　　要：研究基于Modelica语言的热流体系统分布参数模型的面向对象建模方法。鉴于Modelica语言目前不支持偏微分方程形式的描述,提出采用有限体积法将流动传热过程的偏微分控制方程转化为微分代数方程的方法。详细阐述热流体系统的面向对象建模方法及提高模型重用性和可扩展性的机制,建立了热流体基础组件模型库。为验证建模方法的正确性,以一种套筒式换热器的系统模型为例,进行仿真分析,并与通用CFD软件Fluent的仿真结果对比,对比显示模型精度满足要求。研究表明基于Modelica的面向对象建模,为热流体系统的系统级建模和仿真分析提供了一种有效的途径。Object-oriented modeling for distribution parameter thermo-fluid system based on Modelica is investigated in this article. Partial differential equations that governing heat transfer and fluid flow are discretized into differential algebraic equation with finite volume method, because Modelica cannot handle partial differential equations. General object-oriented modeling method for building thermo-fluid system model library and mechanism to increase model reusability and extensibility are presented. Then a general thermo-fluid library is established. In order to verify the models, a heat exchanger is modeled and simulation is carried out. The simulation result is compared with that calculated by Fluent. The comparison indicates that the models have reasonable accuracy. The research demonstrates that the objectoriented modeling based on Modelica provides an efficient method for design and analysis of thermofluid system.

关 键 词：热流体系统 面向对象建模 有限体积法 

分 类 号：N945.12[自然科学总论—系统科学] TP391.9[自动化与计算机技术—计算机应用技术]