1D分析—Flowmaster换热仿真.ppt

分析 –能量守恒 在一个控制体中，能量是守恒的 de1 de2 dW dq DE 分析 – 节点 换热分析网格节点 Thermal Nodes ‘Pressure’ Nodes 热容 对于“体积类元件”，可设置热容参数，从而考查热量的蓄积 Mass of Solid Material Type Fluid Volume 管道元件的热容特性可在“Pipe Thermal Properties”数据子菜单中设置 Pipe Wall and optionally Insulation Thickness Pipe / Insulation Material Types 时间步长的选择 在管道的每一段，假定流体充分混合 精确的结果依赖于: 内部节点的数目(3 20) 时间步长(￡ L / 2V(n+1)) 其它元件同样假定充分混合 瞬态算例1-冷却 在计算网络中使用换热器，减少其流量，分析系统达到稳态的时间 流体物性参数 所需参数: Density Dynamic Viscosity Specific Heat Capacitance Thermal Conductivity Vapour Pressure 固体物性参数 所需参数: Density Coefficient of Linear Expansion Specific Heat Capacity Thermal Conductivity Important to understand: Cooling system Flowmaster component model for heat transfer How to use Flowmaster Components How to obtain and enter heat transfer data for Flowmaster components and system simulation How to interpret and evaluate Flowmaster heat transfer simulation results * Important to understand: Cooling system Flowmaster component model for heat transfer How to use Flowmaster Components How to obtain and enter heat transfer data for Flowmaster components and system simulation How to interpret and evaluate Flowmaster heat transfer simulation results * Important to understand: Cooling system Flowmaster component model for heat transfer How to use Flowmaster Components How to obtain and enter heat transfer data for Flowmaster components and system simulation How to interpret and evaluate Flowmaster heat transfer simulation results * This helps to understand the theory of heat transfer built in the Flowmaster components. It also helps user to know what data need to be entered for each component. For example, for pipe, if the Inner wall temperature is defined, the user only needs to enter the inside convection heat transfer coefficient h1 or the correlation for its calculation, for example, the Dittus Boetler correlation. If the heat flux is defined, then the user again only needs to define the h1 or the correlation for h1, unless he/she als