1、Chapter 1 Thermodynamics and Heat Transfer主要内容1. Concepts: heat (thermal energy)、heat transfer、thermodynamics、total amount of heat transfer、heat transfer rate、heat flux、conduction、convection、radiation2. Equations:1) The first law of thermodynamics (conservation of energy principle)2) Heat balance eq
2、uation: a) closed system; b) open system (steady-flow)3) Fouriers law of heat conduction4) Newtons law of cooling5) 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 sensible heat 显热 heat flux热流密度heat transfer rate热流量tot
3、al amount of heat transfer总热量 conduction导热 convection对流 radiation辐射thermal conductivity 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 fiel
4、d、temperature gradient、heat generation、initial condition、boundary condition、steadytransient heat transfer、uniformnonuniform temperature distribution2. Equations:1) Fouriers law of heat conduction (2-1) 2) Heat conduction equation (in rectangularcylindricalspherical coordinates) (2-2、2-3)3) Boundary
5、conditions: (2-4)a) Specified temperature B. C. b) Specified heat flux B. C. special case(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、cylin
6、ders and spheres (k =const):a) no heat generation, specified B.C.: T(x) or T(r) (2-5) Q(x) or Q(r), Q=constb) with heat generation, Specified B.C. or Convection B.C. : (2-6) Tmax=To-Ts= gs2/2nk ; q(x)=gx/n; Ts=T+ gs/nhcharacteristic length S, shape factor n:plane walls s = L (half thickness), n = 1c
7、ylinders s = ro, n = 2spheres s = ro, n =33. Methods: Solve a heat transfer problem1) Mathematical formulation (differential equation & B.C.)2) General solution of equation3) Application of B.C.s4) Unique solution of the problem主要专业词汇temperature fielddistribution温度场分布 temperature gradient温度梯度heat ge
8、neration热生成(热源) initialboundary 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主要内容1. Concepts: multilayercomposite wall overall heat transfer coeffici
9、ent Uthermal resistance Rt thermal contact resistance Rc critical radius of insulation Rcrfin efficiency fin effectiveness2. Equations: Multiplayer plane wall、cylinders and spheres: Fin: fin equationrefer to the attachment.1) Uniform cross-section: refer to the attachment.2) Varying cross-section: r
10、efer to the attachment.主要专业词汇thermal resistance热阻 parallel 并联 in series串联thermal contact resistance 接触热阻 composite wall 复合壁面thermal grease 热脂 cross-section 横截面 temperature execess 过余温度hyperbolic 双曲线的 exponent 指数fin 肋(翅)片 fin base 肋基 fin tip 肋端fin efficiency 肋效率 fin effectiveness 肋片有效度Chapter 4 Trans
11、ient Heat Conduction主要内容1. Concepts: lumped system analysis characteristic length (Lc=V/A)Biot number (Bi=hLc /k) Fourier number ( = at/L)2. Equations:l Bi0, lumped system analysis (4-1)l Bi0, Heisler/Grober charts OR analytical expressions 1-D:a) infinite large plane walls, long cylinders and spher
12、es (4-2) b) semi-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semi-infinite solid 半无限大固体 complementary error function 误差余函数series 级数 production solution 乘积
13、解Chapter 5 Numerical Methods in Heat Conduction主要内容1. Concepts: control volume (energy balance) method、 finite difference method、discretization、 node、space step、time step、mesh Biot number、mesh Fourier number、mirror image concept、explicit/implicit method、stability criterion (primary coefficients 0) Numerical error: 1) discretization/truncation error; 2) round-off error2. Methods:Numerical solution:1) Discretization in space and time (Dx, Dt);2) Build all nodes finite difference formulations (including interior and boundary nodes); i. Finite difference method