1 E Da Riva AL Lamure CFD thermal simulations IBL Enrico Da Riva AnneLaure Lamure 14th August 2012 14th August 2012 2 E Da Riva AL Lamure A Geometry materials and boundary ID: 248318
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Slide1
14th August 2012
1
E. Da Riva, A.L. Lamure
CFD thermal simulationsIBL
Enrico Da Riva, Anne-Laure Lamure14th August 2012Slide2
14th August 2012
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E. Da Riva, A.L. Lamure
A. Geometry
, materials and boundary conditions
Beam Pipe and insulation
IBL staves
Boundary conditions
CFD simulations settingsSlide3
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E. Da Riva, A.L. Lamure
1.
Beam
Pipe,
insulation
and IPT
Elements
Material
Thickness [mm]
Outer Diameter [mm]
Thermal
conductivity
[ W K-1 m-1]beam pipeberylium0.848.6Heaterspolyimide with stainless steel0.2490.1kapton 2 layerspolyimide0.1249.240.1aerogelsilicat aerogel0,2,40.025kapton 2 layerspolyimide0.120.1aluminium foilaluminum0.05222Gapnitrogen580.0242
Section
Inner Diameter
Thickness
Thermal
conductivity
[W K-1 m-1]
mm
mm
Pixel Area
58
0.325
2.2
Services area
58
0.5Slide4
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E. Da Riva, A.L. Lamure
2. IBL
staves
MATERIALS
Thickness
[
μ
m]
Thermal Conductivity
[W m
-1
K
-1] OMEGA (Carbon Fiber)1502.2* CARBON FOAM (K9)-25 TITANIUM PIPE (i.d. 1.5 mm)1007.2 CARBON-FOAM/CARBON-FIBER GLUE2001** CARBON-FOAM/PIPE GLUE2001** CHIP/CARBON-FIBER GLUE701*** CHIP (silicon)250148 BONDING (tin + 3.5% argent)3006.32 SENSOR (silicon)200148 INNER SUPPORT TUBE – IST (Carbon fiber)10002.2*
*
Assumed as isotropic
**
Stycast
2850FT, manufacturer declared value: 1.02
W m
-1 K-1*** Electrolub HTCP, manufacturer declared value: 2.5 W m-1 K-1
Perfect thermal contact between different layers in the CFD simulationsSlide5
-40
°C
250
°C
17th July 2012
E. Da Riva, A.L. Lamure
5
Convection
3
.
Boundary
Conditions
with
:
. . Bake-out case Slide6
-40
°C
Adiabatic
17th July 2012
E. Da Riva, A.L. Lamure
6
Convection
3
.
Boundary
Conditions
with
:
.
. Nominal case 100W / staveSlide7
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E. Da Riva, A.L. Lamure
4
. CFD simulations settings
Nitrogen flow rate =0kg/s
Natural convection of nitrogen taken into
account
Radiative
heat transfer
transfer
taken into account (emissivity of 0.05 for the Beam Pipe, 1 for other surfaces)
Dependence of nitrogen properties on temperature taken into account
Laminar natural convection flowSlide8
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E. Da Riva, A.L. Lamure
B. CFD Simulations
Bake-out caseNominal caseSummary tableSlide9
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E. Da Riva, A.L. Lamure
1.
Bake
-out
Insulation
: 0mm
-36°C
76°C
Slide10
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E. Da Riva, A.L. Lamure
1.
Bake
-out
Insulation
: 2mm
-36°C
53°C
Slide11
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E. Da Riva, A.L. Lamure
1.
Bake
-out
Insulation
: 4mm
-36°C
47°C
Slide12
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E. Da Riva, A.L. Lamure
2
. Running nominal
Insulation
: 0mm
-17°C
-26°C
Slide13
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E. Da Riva, A.L. Lamure
2
. Running nominal
Insulation
: 2mm
-17°C
-26°C
Slide14
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E. Da Riva, A.L. Lamure
2
. Running nominal
Insulation
: 4mm
-17°C
-26°C
Slide15
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E. Da Riva, A.L. Lamure
3
.
Summary
table
Geometry
Case
Insulation
Temperature
Tsensor max
T IPT max convect
mm
°C
°C
IBL Only
Bake-Out
0
-3676IBL Only
Bake-Out
2
-36
53
IBL Only
Bake-Out
4
-36
47
IBL Only
Nominal
0
-17
-26
IBL Only
Nominal
2
-17
-26
IBL Only
Nominal
4
-17
-26Slide16
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E. Da Riva, A.L. Lamure
C. Comparison
with previous results
Bake-out case
Nominal caseSlide17
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E. Da Riva, A.L. Lamure
Summary
tableSlide18
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E. Da Riva, A.L. Lamure
Thank you
for your attention !