4对流换热原理.pdf

文档介绍：ΚƑܾ
ҔᏄҚ
HUST Lab of Thermal Science & Engineering
జజ ऋސύऋސύ
?4-1 ऋސ
ඪ
خ
ސӀऋऋ 4-2?
?4-3 ऋސ
Ǿ
?4-4 Ӏ
?4-5 ऋऋސ
2005-8-2 1
ΚƑܾ
ҔᏄҚ
HUST Lab of Thermal Science & Engineering
??44--11 ऋސऋސ
1 ऋސ
‰ऋސ ऋȏ<޻!
"ȏ_
$%
&'( )*ҋ,
ऋ
0 '/.
-'
,خ
ऋސऋ12 )34ऋ)Ʊ4
- 61*78'
9
ऋސҔ; 1) <=౧ሓ; 2) @ѤBCD
δ
2005-8-2 2
ΚƑܾ
ҔᏄҚ
HUST Lab of Thermal Science & Engineering
Šऋސ
GH 

 -ऋ2IJK
LM'(

,_$ R<ҋؿO4P޻޻! Qऋȏ 

6ƱؿO4TU S
( ;]ސऋ
GؓX౒Ρ‹
` 0
Gؓ\]^_
ސऋ
2005-8-2 3
ΚƑܾ
ҔᏄҚ
HUST Lab of Thermal Science & Engineering
abcde౒Ρ
ऋސ 0ऋȏXf
ऋgh <fऋTh ऋdeTh[
"
u∞∞∞ t∞∞∞ tw
ȏ_$ 0ijऋȏࣵ_$ऋ
l[ x
no8P_$
l[ yn 0
y t

u

tw
qw x
2005-8-2 4
ΚƑܾ
ҔᏄҚ
HUST Lab of Thermal Science & Engineering
_$ऋȏѤ
qrȒt )ȩv_$w

ऋȏ*xǎ1z{
|} Q࡚Hǎ
[€
ऋȏ*1‚t
R0
ƒ„ǎ…†‡
Ȓt )ȩऋȏghK8Pǎ
_$
lwˆ‰Š‹ 0ऋȏghŒ_$w

ghɢ࡛‹‘̤ fऋ
ghɢ 0
2I )“"ȏ_$
ऋƱ”KऋȏѤ

Ȓt•lऋȏ–— ('- ))˜1™›
ऋȏ
ऋœ̤•ž Qऋ R) Ʊ-Ÿ
 ¡_$x
ऋȏTh࡛Œ_$Th‹‘
̤fऋTh 0
2005-8-2 5
ΚƑܾ
ҔᏄҚ
HUST Lab of Thermal Science & Engineering
2 ऋސ
¢
ऋސ - + ऋ 6_$ +ऋ
‰ ऋ£¤
¥¦ऋऋȏ¤§¨Th12œ©£
ªhU«ܖ­‰
ऋ QFree convection R
®¯ऋ„°‡ Q8²o³´ oࢠ¶
RȒtܖ­‰
ऋ QForced
convection R
h > h

2005-8-2 6
ΚƑܾ
ҔᏄҚ
HUST Lab of Thermal Science & Engineering
Š ऋ|}
ऋඥ
Ӏऋ¸eऋ¹ºd»ǒ֧]
QLaminar flow R
ॵऋऋȏÀHÁLMÂÃÄ
S
QTurbulent flow R
hॵऋ> hӀऋ
ऋऋ[Åል
خÍÎÏÏ )ÐÑK
நႋÉÊѱ༐¦¥
³ƑÓÓÔܰ)XÖ××ØÙÚ*„Û=
ऋ©£
0
2005-8-2 7
ΚƑܾ
ҔᏄҚ
HUST Lab of Thermal Science & Engineering
2005-8-2 8
ΚƑܾ
ҔᏄҚ
HUST Lab of Thermal Science & Engineering
‹ ऋȏ4‹
Ρސ
‹ސ ÜÝ oÞຨ oàΚ oÜ" oâ‘
h > hΡ
ã ऋȏ"ȏ_$
޻!
9
˷¨ऋऋސ ౧˷åæ˷
޶֧è oé౧ o౧ê° ސऋऋ¨°
ë ऋȏS *ìI%˫
îி}ऋސ I%4˫
ி}ऋސ I%Â˫
2005-8-2 9
ΚƑܾ
ҔᏄҚ
HUST Lab of Thermal Scienc