摘要
为得到辐射对流通道中的温度分布,依据能量守恒原理,建立了辐射、对流非线性边界条件下圆形管壁与管内空气的传热数学模型,提出了管壁温度、管内冷却空气温度一维稳态换热有限差分求解方法,其中辐射换热计算采用基于辐射传递系数的蒙特卡罗法。分析了相关参数对辐射通道温度分布的影响,所研究的参数包括辐射器表面温度、管道长度与半径比、管内冷却空气流速等。计算结果表明:辐射器表面温度是影响辐射通道最高温度的主要因素。此方法可为辐射通道精细的热工特性计算提供温度场数据。
To determine the temperature distribution in a radiation-convection channel, a mathematical model was set up on the basis of energy conservation theory to reflect the heat transfer of air in a tube to a circular tube wall under radiation and convection nonlinear boundary conditions. A finite difference method is presented for solving the one-dimensional steady-state heat exchange of tube wall temperature and in-tube cooling air temperature. For the radiation heat exchange calculation adopted was a radiation heat transfer factor-based Monte Carlo method. The impact of relevant parameters on the temperature distribution in the radiation channel is analyzed. The parameters being studied include radiator surface temperature, the ratio of piping length to radius, the flow speed of cooling air in the tube, etc. The results of the calculation indicate that the surface temperature of the radiator represents a major factor influencing the maximum temperature in the radiation channel. The method under discussion can provide temperature field data for the detailed thermodynamic characteristics calculation of a radiation channel.
出处
《热能动力工程》
EI
CAS
CSCD
北大核心
2005年第4期394-396,共3页
Journal of Engineering for Thermal Energy and Power
基金
黑龙江省教育厅科学研究基金资助项目(10541048)
黑龙江省自然科学基金资助项目(E2004-21)
关键词
辐射传热
有限差分法
数值模拟
温度场
radiation heat transfer, finite difference method, numerical simulation, temperature field
