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1、Chapter 1 Thermodynamics and Heat Transfer主要內(nèi)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主要專業(yè)詞匯heat transfer 傳熱、熱傳遞、傳熱學(xué) thermodynamics熱力學(xué)caloric 熱素 specific heat 比熱 mass flow rate 質(zhì)量流率latent heat 潛熱 sensible heat 顯熱 heat flux熱流密度heat transfer rate熱流量tot

3、al amount of heat transfer總熱量 conduction導(dǎo)熱 convection對流 radiation輻射thermal conductivity 熱導(dǎo)率 thermal diffusivity 熱擴(kuò)散率convection/combined heat transfer coefficient 對流/綜合換熱系數(shù)emissivity 發(fā)射率 absorptivity 吸收率simultaneous heat transfer 復(fù)合換熱Chapter 2 Heat Conduction Equation主要內(nèi)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主要專業(yè)詞匯temperature fielddistribution溫度場分布 temperature gradient溫度梯度heat ge

8、neration熱生成(熱源) initialboundary condition初始邊界條件transient heat transfer瞬態(tài)(非穩(wěn)態(tài))傳熱 isothermal surface 等溫面Heat conduction differential equation 導(dǎo)熱微分方程trial and error method試算法 iterate迭代 convergence 收斂Chapter 3 Steady Heat Conduction主要內(nèi)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.主要專業(yè)詞匯thermal resistance熱阻 parallel 并聯(lián) in series串聯(lián)thermal contact resistance 接觸熱阻 composite wall 復(fù)合壁面thermal grease 熱脂 cross-section 橫截面 temperature execess 過余溫度hyperbolic 雙曲線的 exponent 指數(shù)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主要內(nèi)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)主要專業(yè)詞匯lumped system analysis 集總參數(shù)法 characteristic length 特征長度（尺寸）dimension 量綱 nondimensionalize 無量綱化 dimensionless quantity 無量綱量semi-infinite solid 半無限大固體 complementary error function 誤差余函數(shù)series 級數(shù) production solution 乘積

13、解Chapter 5 Numerical Methods in Heat Conduction主要內(nèi)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) N

14、umerical 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 ii. Energy balance method (i.e. Control Volume method)3) Solution of nodal difference eqs. of heat conduction; i. Direct method: Gaussian Eliminationii. Iterative method: Gauss-Seidel iteration