Study on heat transfer of porous media for isothermal chamber
Study on heat transfer of porous media for isothermal chamber
复制标题
等温室多孔介质传热研究
DOI：
10.1016/j.expthermflusci.2012.11.019
复制
发表时间：
2013-04-01
影响因子：
3.2
通讯作者：
Ping, Liu
中科院分区：
文献类型：
--
作者：
Yang Lihong;Yi, Gan;Ping, Liu
等温腔是由空心腔体填充金属丝制成的，可用于气动元件流量特性测试和非定常流发生器的制作，其温度特性对其应用效果至关重要。本文在将等温室中的填充物视为大孔隙率多孔介质并对其物性参数进行实验测试的基础上，通过实验和数值模拟研究了三种等温室放电过程中的温度特性。从实验和模拟结果可以看出，与空室放电相比，A、B和C室的放电过程基本上是等温的。模拟结果与实验结果虽有差异，但趋势一致，且模拟结果受等效导热系数影响较大。因此，数值模拟是一种高效、节能、降低成本的方法。(c)2012 Elsevier Inc. All rights reserved.
Isothermal chamber, which is fabricated by empty chamber stuffed with thin metal wires, could be used for testing the flow rate characteristics of pneumatic component and for forming unsteady flow generator, and its temperature characteristics are critical to its application results. In this paper, based on the stuffers in isothermal chamber were considered as porous media with large porosity and its physical parameters were tested by experiments, temperature characteristics during discharge of three isothermal chambers were studied by experiments and numerical simulations. From the results of experiment and simulation, compared with discharge of empty chamber, it could be seen the discharge processes of chamber A, B and C are nearly isothermal. Though there are differences between simulation and experiment, they share same trends and the simulation result was affected by ETC (effective thermal conductivity) greatly. Consequently, numerical simulation is an efficient, energy-saving and cost-reducing method. (c) 2012 Elsevier Inc. All rights reserved.