第
35
卷第
5
期
2013
年
5
月
北京科技大学学报
Journal
of
University
of
Science
and
Technology
Beijing
kdqd
-Ti
OO
N2
5WU
MM
O
V
大型光亮退火马弗炉加热段温度场模拟
杨竞飞武传标
1)
,孙朝阳
1)
囚,叶乃成
2)
,类奇袭
2)
1
)北京科技大学机械工程学院,北京
100083
2)
宁波宝新不锈钢有限公司,宁波
315807
区
i
通信作者.
E-mai
l:
suncy@ustb.edu.cn
摘要
建立了大型光亮退火马弗炉加热段温度场的三维仿真模型该模型考虑了马弗炉实际结构、带钢退火速度和升
温曲线特点,采用等效热流密度表征马弗管内保护气体和带钢的换热;选择组分传输燃烧模型、离散坐标辐射模型和标
准
k-ê
双方程端流模型描述马弗炉内燃烧、换热和气体流动;应用
SIMPLE
计算方法进行求解典型规格
304
不锈钢
带光亮退火过程实测特征点温度值和模拟结果基本吻合-分析得到了马弗炉内温度场、流场和速度场分布规律.结果表
明:马弗管温度比较均匀,喷嘴正对区域温度偏高;燃气气流沿马弗管壁螺旋流动实现均匀加热.喷吹量较小时,喷吹
量(入口速度)越大,马弗炉内温度越高;喷吹量继续增大,马弗炉内温度反而开始降低
关键词
马弗炉;退火;温度分布:数值方法;计算机模拟
分类号
TG155.1
Temperature
simulation
of
the
heating
segment
of
large
bright
an-
nealing
mu
fH
e
furnaces
瓦
4NG
Jing
1
)
,
问
'u
Chuan-bi
α
0
1
)
,
SUN
Chao-y
α
ng
1
)
回
,
YEN
ω
-wei
2
)
,
LOU
Qi-xi
2
)
1)
School of Mechanical
Engineeri
吨.
University of Science and
Tech
口
ology
Beiji
吨,
Beiji
吨
100083
,
China
2)
Ni
吨
bo
Baoxin Stainless Steel Co. Ltd.,
Ni
吨
bo
315807, China
囚
Corresponding
author, E-mail: suncy@ustb.edu.cn
ABSTRACT
A
three-dimensional
simulation
model
was
built
to
investigate
the
temperature
field
of
the
heating
segment
of
a
bright
annealing
muffie furnace.
Based
on
the
actual
structure
of
the
muffie
furnace
as well as
the
annealing
speed
and
heating
curves
of
steel
strips
,
th巳 equivalent
heat
fiux was
proposed
in
this
model
to
characteriz
巳
heat
exchanges
between
the
protection
gas
and
steel
strips
in
the
muffie furnace.
Then
the
combustio
日
model
for
the
transport
and
reaction
of
gaseous
compone
丑
ts
,
the
radiation
heat
transfer
model
and
the
k-
εtwo-equation
turbulence
model
for
turbulent
fiow
in
the
muffie furnace were
adopted
respectively.
The
SIMPLE
method
was
used
to
solve
the
mode
l.
Simulation
results
by
the
model
are
consistent
with
the
measured
temperature
values
of
characteristic
points
in
an
SUS304
stainless
steel
strip
during
the
bright
annealing
process.
The
temperature
, velocity
and
fiow fields
in
the
muffie
furnace
were
obtained
by
this
mode
l.
It
is
shown
that
the
distribution
of
temperature
on
the
muffie
tube
surface is
relatively
even,
and
only
the
zone
of
the
burner
has
a
higher
temperature.
The
muffie
tube
is
approximately
uniformly
heated
since
the
combustion
gases fiow
along
the
muffie
tube
spirally.
With
the
injection
quantity
(inlet velocity)
increasing
,
the
temperature
in
the
muffie
furnace
rises
gradually;
however,
when
the
inj
巳
ction
quantity
is
above
a
limit
,
the
temperature
in
the
muffi
巳
furnace
begins
to
drop.
KEY
巩
TORDS
muffie furnace; annealing;
temperature
distribution;
numerical
methods;
computer
simulation
光亮退火工艺是在高温条件下使不锈钢带实
现固溶退火改善组织性能和还原气氛
(H
2
)
作用下
达到表面光亮的工艺,是生产高等级光亮不锈钢带
的关键工序
[1]
大型光亮马弗炉作为光亮退火生
产线的关键技术设备近年来得到一定的推广应用,
该马弗炉主要由入口密封箱、加热段、冷却段和返
收稿日期
2012-01-18
基金项目:高等学校博士学科点专项科研基金资助项目
(20100006120013)