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14th August 2012 - PowerPoint Presentation

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14th August 2012 - PPT Presentation

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

riva 2012 august lamure 2012 riva lamure august 14th bake nominal insulation ibl case carbon pipe thermal cfd fiber

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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

2

E. Da Riva, A.L. Lamure

A. Geometry

, materials and boundary conditions

Beam Pipe and insulation

IBL staves

Boundary conditions

CFD simulations settingsSlide3

14th August 2012

3

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

14th August 2012

4

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

14th August 2012

7

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

14th August 2012

8

E. Da Riva, A.L. Lamure

B. CFD Simulations

Bake-out caseNominal caseSummary tableSlide9

14th August 2012

9

E. Da Riva, A.L. Lamure

1.

Bake

-out

Insulation

: 0mm

-36°C

 

76°C

 Slide10

14th August 2012

10

E. Da Riva, A.L. Lamure

1.

Bake

-out

Insulation

: 2mm

-36°C

 

53°C

 Slide11

14th August 2012

11

E. Da Riva, A.L. Lamure

1.

Bake

-out

Insulation

: 4mm

-36°C

 

47°C

 Slide12

14th August 2012

12

E. Da Riva, A.L. Lamure

2

. Running nominal

Insulation

: 0mm

-17°C

 

-26°C

 Slide13

14th August 2012

13

E. Da Riva, A.L. Lamure

2

. Running nominal

Insulation

: 2mm

-17°C

 

-26°C

 Slide14

14th August 2012

14

E. Da Riva, A.L. Lamure

2

. Running nominal

Insulation

: 4mm

-17°C

 

-26°C

 Slide15

14th August 2012

15

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

14th August 2012

16

E. Da Riva, A.L. Lamure

C. Comparison

with previous results

Bake-out case

Nominal caseSlide17

14th August 2012

17

E. Da Riva, A.L. Lamure

Summary

tableSlide18

14th August 2012

18

E. Da Riva, A.L. Lamure

Thank you

for your attention !