Chapter 1 Thermodynamics and Heat Transfer
主要内容
1. Concepts:
heat (thermal energy)、heat transfer、thermodynamics、total amount of heat transfer当然可以的英文、heat transfer rate、heat flux、conduction、convection、radiation
2. Equations:
1) The first law of thermodynamics (conrvation of energy principle)
2) Heat balance equation: a) clod system; b) open system (steady-flow)
affections3) Fourier’s law of heat conduction
4) Newton’s law of cooling
5) Stefan-Boltzmann law
主要专业词汇
heat transfer 传热、热传递、传热学 thermodynamics热力学
caloric 热素 specific heat 比热 mass flow rate 质量流率
latent heat 潜热 nsible heat 显热 heat flux热流密度
heat transfer rate热流量 total amount of heat transfer总热量
conduction导热 convection对流 radiation辐射
thermal conductivity argentina热导率 thermal diffusivity 热扩散率
convection/combined heat transfer coefficient 对流/综合换热系数
emissivity 发射率 absorptivity 吸收率
simultaneous heat transfer 复合换热
Chapter 2 Heat Conduction Equation
主要内容
1. Concepts:
temperature field、temperature gradient、heat generation、initial condition、boundary condition、steady\transient heat transfer、uniform\nonuniform temperature distribution
2. Equations:
1) Fourier’s law of heat conduction (§2-1)
2) Heat conduction equation (in rectangular\cylindrical\spherical coordinates) (§2-2come and get it、so ho§2-3)
3) Boundary conditions: (§2-4)
a) Specified temperature B. C.
b) Specified heat flux B. C. [special ca(dt/dx=0): insulation、thermal symmetry];
c) Convection B.C.
d) Radiation B.C.
e) Interface B.C.
4) Average thermal conductivity kave (§2-7)
5) Solution of one-dimensional, steady heat conduction in plane walls、cylinders and spheres (k =const)：
a) no heat generation, specified B.C.: T(x) or T(r) (§2-5)
Q(x) or Q(r), Q=const
b) with heat generation, Specified B.C. or Convection B.C. : (§2-6)
∆Tmax=To-Ts= gs2/2nk ; q(x)=gx/n; Ts=T+ gs/nh
characteristic length S, shape factor n:
plane walls — s = L (half thickness), n = 1
cylinders —— s = ro, n = 2
spheres —— s = ro, n =3
3. Methods: Solve a heat transfer problem
1) Mathematical formulation (differential equation & B.C.)mikan
2) General solution of equation
3) Application of B.C.s
4) Unique solution of the problem
主要专业词汇
temperature field\distribution温度场\分布 temperature gradientmastercard是什么意思温度梯度
heat generation热生成(热源) initial\boundary condition初始\边界条件
transient heat transfer瞬态(非稳态)传热 isothermal surface 等温面
Heat conduction differential equation 导热微分方程
trial and error method试算法 iterate迭代 convergence 收敛
Chapter 3 Steady Heat Conduction
儿童英语动画片主要内容
1. Concepts:
multilayer\composite wall overall heat transfer coefficient U
thermal resistance Rt thermal contact resistance Rc critical radius of insulation Rcr
fin efficiency fin effectiveness
2. Equations:
✓ Multiplayer plane wall、cylinders and spheres:
✓ Fin: fin equation——refer to the attachment.
1) Uniform cross-ction: extendedrefer to the attachment.
2) Varying cross-ction: refer to the attachment.
主要专业词汇
thermal resistance热阻 parallel 并联 in ries串联
thermal contact resistance 接触热阻 composite wall 复合壁面
thermal grea 热脂 cross-ction 横截面 temperature execess 过余温度
hyperbolic 双曲线的 exponent 指数
fin 肋(翅)片 fin ba 肋基 fin tip 肋端
fin efficiency 肋效率 fin effectiveness 肋片有效度
Chapter 4 Transient Heat Conduction
主要内容
1. Concepts:
lumped system analysis characteristic length (Lc=V/A)
Biot number (Bi=hLc /k) Fourier number ( τ = at/L)
2. Equations:
● Bi≤0, lumped system analysis (§4-1)
合影英文
● Bi>0, Heisler/Grober charts OR analytical expressions
✓ 1-D：a) infinite large plane walls, long cylinders and spheres (§4-2)
b) mi-infinite solids (§4-3)
✓ multidimensional: product solution (§4-4)
主要专业词汇
lumped system analysis 集总参数法 characteristic length 特征长度（尺寸）
dimension 量纲 nondimensionalize 无量纲化 dimensionless quantity 无量纲量
mi-infinite solid 半无限大固体 complementary error function 误差余函数
ries 级数 production solution 乘积解
Chapter 5 Numerical Methods in Heat Conduction
