摘要
在流场模型的基础上,通过对圆柱坐标系下轴对称管道壁面划分的二维有限体积网格,建立了一种计算管壁瞬变传热的有限体积模型,可处理对流换热和辐射换热两种边界情况,可处理具有包覆层或真空夹层结构的变物性管壁传热.温度场模型是流场建模思想的自然延伸,对二者的组合运用即为所发展的可仿真准一维可压缩流管内瞬变流动的有限体积模型,一方面,在流场仿真的体系内发展了传热计算的部分并最终扩展成为统一的流动/传热仿真体系,另一方面,结合阀芯节流模型,从此模型出发可推导出管路系统常见元件的流场和温度场模型.对某发动机试验台液氧贮箱增压系统的建模与仿真表明,提出的模型体系具有很好的适用范围和良好的仿真精度.
Based on the flow field model, a finite volume model suitable for simulating pipe wall transient heat transfer was established by employing two-dimensional finite control volume grids in axisymmetric cylindrical coordinates which can deal with two boundary heat transfer conditions including convection and radiation. Variable thermophysical properties of wall material and multilayer or vacuum sandwich structure of pipe wall were also considered. The temperature field model is a natural extension of flow field modeling method. The union of both forms the finite volume model （FVM） of quasi one-dimensional compressible transient pipe flow, which is a uniform numerical system of flow and heat transfer. Furthermore, combing with throttling model of valve core, the model can be further developed to establish the flow field and temperature field models of common components in pipe system. The modeling and simulation of a certain liquid rocket engine test-bed LO2 tank pressurization system shows that the FVM has a wide scope of application and good simulation precision.
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2008年第2期317-322,共6页
Journal of Aerospace Power
关键词
航空
、航天推进系统
一维可压缩流
瞬变管流
管壁传热
有限体积法
系统动态仿真
aerospace propulsion system
one-dimensional compressible flow
transient pipe flow
heat transfer of pipe wall
finite volume method
system dynamic simulation
