套管换热器的三维数值模拟与分析
3D Numerical Simulations and Analysis of Double Pipe Heat Exchangers
赵明翔 1李少辉 1杨丹丹 1郑洪川 1文小平1
作者信息
- 1. 北京航天发射技术研究所,北京,100076
- 折叠
摘要
采用FLUENT软件对平直和弯曲套管的整体换热性能进行了数值模拟,并与经验公式进行了对比.数值计算结果表明:FLUENT耦合算法得到的套管总传热系数与经验公式计算结果吻合良好.与平直套管相比,弯曲套管内热空气所受到的离心力使其换热效率提高,在相同等效长度和流动条件下弯曲套管换热器可使总传热系数提高10%.
Abstract
Heat exchangers are extensively used in rocket power system for gas supply and distribution.Three-dimensional numerical simulations of two different heat exchangers through straight and curve tubes,respectively,are performed by commercial software FLEUNT.Comparisons are made between numerical and empirical results.The investigation indicates that the total heat transfer coefficient obtained by FLUENT using the flow-heat coupled algorithm agrees well with that from the empirical formula.Moreover,compared with heat exchanger through straight tubes,the centrifugal force exerted on the hot air in the heat exchanger through curve tubes leads to higher heat transfer efficiency.As a result,the total heat transfer coefficient of heat exchanger through curve tubes is approximately 10%greater than that through straight tubes given other flow and geometry factors fixed.
关键词
套管换热器/三维数值模拟/FLUENT耦合算法/离心力/总换热系数Key words
double pipe heat exchangers/3D numerical simulation/flow-heat coupled algorithm in FLUENT/centrifugal force/total heat transfer coefficient引用本文复制引用
出版年
2024
NETL
NSTL
万方数据