摘要
船舶海水冷却管网系统内流体具有复杂的流动状态,随着雷诺数及相对粗糙度的变化,不同工况下层流、紊流和过渡流等流动状态都可能存在。为了精确描述管网内流体流动状态,提高海水冷却管网计算精度,本文提出采用"变流阻系数"迭代法,在计算过程中动态更新系统网络各分支管路的阻力系数。本文的理论计算基于图论理论,在Matlab软件中编程实现。理论计算与试验结果对比表明,二者具有较好的一致性。研究发现利用"变流阻系数"网络解算算法对船舶海水冷却管网进行水力分析,可以大大减小解算误差,提高解算精度。
There are complicated flow states in seawater cooling piping network of ship. The flow states may be varied from laminar flow to turbulent flow or transitional flow as the Reynolds number and the relative roughness of pipeline changed. In order to describe the fluid flow of the piping network accurately and improve the accuracy of calculation of the system, a method of variable flow resistance coefficient which can update the resistance coefficient of each branch pipe of the system dynamically in the process of calculation is proposed in the paper. The theoretical calculation is based on graph theory, programming in Matlab software. Good agreements were obtained between theoretical calculations and experimental results. It is found that the calculation error can be reduced and calculation accuracy can be improved greatly with the method of variable flow resistance coefficient in analysis of seawater cooling piping network of ship.
出处
《舰船科学技术》
北大核心
2014年第2期102-107,共6页
Ship Science and Technology
基金
舰船蒸汽动力国家实验室自主创新基金资助项目(KFJJ201201)
关键词
图论
网络解算
海水冷却管网
流量分配变流阻系数
graph theory
network solution
seawater cooling pipelines network
flow distribution
variable flow resistance coefficient
