(5.11)--常见单词传热学传热学传热学.doc

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1、B毕渥数Biot number保温材料insulating material边界条件boundary condition表面传热系数convective heat transfer coefficientC初始条件initial condition传热系数over-all heat transfer coefficient传热过程over-all heat transfer process传热量heat transfer rateD大空间自然对流natural convection in infinite space大容器沸腾pool boiling导热heat conduction当量直径e

2、quivalent diameter等温线isotherms定解条件conditions for unique solution定向辐射力directional emissive power定向辐射强度directional radiation intensity定性温度reference temperature对流传热convection heat transfer对数平均温差log-mean temperature differenceF发射率（黑度）emissivity沸腾换热boiling heat transfer非稳态导热unsteady heat conduction傅里叶导热定

3、律fouriers law of heat conduction辐射传热radiation heat transfer辐射换热网络图thermal network of radiation heat transfer辐射力（总辐射力）（hemispherical）emissive power封闭系统enclosure systemG格拉晓夫数Grashof number隔热材料insulating material管内层流laminar flow in tube管内湍流turbulent flow in tube管壳式换热器tube-and-shell heat exchanger光谱发射率s

4、pectral emissivity光谱吸收比spectral absorptivity过余温度excess temperatureH黑体black body横掠单管flow across single tube横掠管束flow across tube bundles灰体gray body换热器heat exchangerJ基尔霍夫定律kirchhoffs law交叉流cross flow角系数view factor; angle factor集中参数法lumped method节点node紧凑式换热器compact heat exchanger间壁式换热器recuperators 具有内热源

5、的导热heat conduction with internal heat source绝热的adiabaticL兰贝特定律lamberts law肋片fin肋效率fin efficiency雷诺数Reynolds number立体角solid angle连续性方程continuity equation临界雷诺数critical Reynolds number流动边界层flow boundary layerM漫反射diffuse reflection漫射体diffuse body膜态沸腾film boiling膜状凝结film-wise condensationN内部流动internal fl

6、ow能量方程energy equation内热源internal heat source牛顿冷却公式newtons law of cooling逆流counter-flow逆流式换热器counter-flow heat exchanger凝结传热condensation heat transfer努赛尔数Nusselt numberP普朗特数Prandtl numberQ气体辐射gaseous radiation强化传热enhancement of heat transfer强制对流forced convectionR热边界层thermal boundary layer热导率（导热系数）the

7、rmal conductivity热辐射thermal radiation热扩散率（导温系数）thermal diffusivity热流量heat transfer rate热流密度heat flux热阻thermal resistance热物性参数thermo-physical property入口段entrance regionS顺流parallel-flow顺流式换热器parallel-flow heat exchanger速度边界层velocity boundary layer算数平均温差arithmetic mean temperature difference实验关联式experi

8、ment correlationT特征长度characteristic length投入辐射irradiation湍流turbulent flowW外部流动external flow外掠平板flow along a flat plate温度场temperature field温度边界层temperature boundary layer温度梯度temperature gradient稳态导热steady-state heat conductionX吸收比absorptivity相似原理similarity principleY一维稳态导热1-dimensional steady state heat conduction有限空间自然对流natural convection in enclosure有效辐射radiosityZ遮热板thermal shield直角坐标rectangular coordinate珠状凝结drop-wise condensation柱坐标cylindrical coordinates自然对流natural convection