-
Chapter 1
Thermodynamics and Heat
Transfer
主要内容
1.
Concepts:
heat (thermal
energy)
、
heat transfer
、
thermodynamics
、
< br>total
amount
of
heat
transfer
、
heat
transfer
rate
、
heat
flux
、
conduction
、
convection
、
rad
iation
2.
Equations:
1)
The
first
law
of
thermodynamics
(conservation
of
energy
principle)
2)
Heat
balance
equation:
a)
closed
system;
b)
open
system
(steady-flow)
3)
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
the
rmodynamics
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
密度
heat transfer
rate
热流量
量
heat
flux
热流
total
amount of heat transfer
总热
con
duction
导热
convection
对流
radiation
辐
射
< br>
thermal
conductivity
热导率
thermal
diffusivity
热扩散
率
convection/combined heat transfer
coefficient
对流
/<
/p>
综合换热
系数
emissivity
发射率
率
absorptivity
吸
收
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
、
steadytransient
heat
transfer
、
uniformnonuniform
temperature distribution
2.
Equations:
1) Fourier
’
s law
of heat conduction
(
§
2-1)
2)
Heat
conduction
rectangularcylindricalspherical
(
§
2-2
、§
2-3)
equation
(in
coordinates)
3) Boundary
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
k
ave
(
§
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)
?
T
max
=
T
o
-
T
s
=
g
s
2
/2
nk
;
q
(
x
)=
gx
/
n
;
T
s
=
T
?
+
gs
/
nh
characteristic length
S
, shape factor
n
:
plane walls
—
s
=
L
(
half
thickness
),
n
= 1
cylinders
——
s
=
r
o
,
n
= 2
spheres
——
s
=
r
o
,
n
=3
3.
Methods:
Solve a heat transfer
problem
1) Mathematical
formulation (differential equation & B.C.)
2) General solution of equation
3) Application of B.C.s
4)
Unique solution of the problem
主要专业词汇
temperature
fielddistributio
n
温
度
场
分
布
temperature
gradient
温度梯度
heat generation
热生成
(
热源
)
initialboundary condition
初始<
/p>
边界条件
transient
heat
tr
ansfer
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<
/p>
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 coefficient U
thermal
resistance
R
t
thermal
contact
resistance
R
c
critical
radius
of
insulation
R
cr
fin efficiency
fin
effectiveness
2.
Equations:
?
Multiplayer plane
wall
、
cylinders and spheres:
?
Fin: fin
equation
——
refer to the
attachment.
1)
Uniform cross-section:
refer to the
attachment
.
2) Varying
cross-section:
refer 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
Transient Heat
Conduction
主要内容
1.
Concepts:
lumped system analysis
characteristic length (
L
c
=V/A)
Biot number
(Bi=
hL
c
/
k
)
Fourier number
(
τ
=
at
/
L
)
2.
Equations:
?
Bi
≤
0,
lumped system
analysis
(
§
4-1)
?
Bi>0,
Heisler/Grober
charts
OR
analytical expressions
1-D
：
a)
infinite large plane walls,
long cylinders and spheres
(
§
4-2)
b)
semi-infinite solids
(
§
4-3)
multidimensional:
product solution
(
§
4-4)
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