我最近做了个传热的稳态分析,不知道热流率结果正确不?跟实际情况比较,偏大很多啊。我的命令流如下,请高手指教下,万分感谢!!!
!国际单位
finish
/clea
/filname,stady thermal tongti
/prep7
CSWPLA,11,1,510/1010,1,
/PREP7
et,1,solid70 !保温层单元
MP,kxx,1,0.03 !珠光沙导热系数为0.03W/m*C
K,1,-1010e-3,,,
K,2,1010e-3,,,
l,1,2
CSYS,0
LSYMM,Y,1, , , ,0,0
LPLOT
wprota,,,90
lsbw,all
ldele,3,5,1,1
numcmp,all
k,3,,-439e-3-510e-3
k,4,1155.6e-3,-439e-3+270.9e-3-510e-3
k,5,1300e-3,65e-3-510e-3
larc,3,4,2,2600e-3
larc,4,5,2,260e-3
l,2,3
k,6, 1010e-3, 3025e-3
k,7, 1300e-3, 3025e-3
l,1,6
l,5,7
wpcsys,-1
wpoff,,3025e-3
csys,4
lsymm,y,all,,,,
nummrg,all
FLST,2,12,4
FITEM,2,4
FITEM,2,2
FITEM,2,3
FITEM,2,6
FITEM,2,12
FITEM,2,9
FITEM,2,8
FITEM,2,10
FITEM,2,7
FITEM,2,11
FITEM,2,5
FITEM,2,1
AL,P51X
vrotat,1,,,,,,2,9,180,1
!---------------------------------------
alls
csys,0
wpcsys,-1
wprota,,90
vsbw,all
vsel,s,loc,y,-10000e-3,0
vdele,all,,,1
alls
!----------------------V2-钢管,V1-保温层
vatt,1,,1
esize,100e-3
MSHAPE,1,3D
MSHKEY,0
vmesh,all
alls
save
fini
/solu
asel,s,,,8,10
nsla,s,1
d,all,temp,-196 !内壁温度为-196度
asel,s,,,5,7
asel,a,,,17
nsla,s,1
sf,all,conv,8.14,20 !外表面与空气对流系数为8.14W/m2*C,环境温度为20度
alls
solve
FINISH
/POST1
ETABLE, ,NMISC,5
ETABLE, ,NMISC,11
ETABLE, ,NMISC,17
ETABLE, ,NMISC,23
ETABLE, ,NMISC,29
ETABLE, ,NMISC,35
SSUM !结果共为537.510W的热流率
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