CLIFF/divertor heat transfer by Sergey Smolentsev APEX e-Meeting 22 - - PowerPoint PPT Presentation

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May 21, 2023 213 likes •269 views

CLIFF/divertor heat transfer by Sergey Smolentsev APEX e-Meeting 22 February 4, 6 2003 Temperature rise over OB FW L=8.4 m Ts, no waves OB FW U=10 m/s Tb 100 h=2.3 cm Ts, with waves B=10 T 80 To=350 C Tallowable=510 C Surface

SLIDE 1

CLIFF/divertor heat transfer by Sergey Smolentsev

APEX e-Meeting 22 February 4, 6 2003

SLIDE 2

Temperature rise over OB FW

L=8.4 m U=10 m/s h=2.3 cm B=10 T To=350 C Tallowable=510 C Surface heating (Tom Rognlein) Neutron heating (7 MW/m2 av.)

0.2 0.4 0.6 0.8 1

x / L

20 40 60 80 100

(T-To), K

Ts, no waves Tb Ts, with waves

OB FW No waves Tmax=To+∆T=350+90=440<510 C With waves Tmax=To+∆T=350+60=410<510 C

SLIDE 3

Temperature rise over outer divertor

0.1 0.2 0.3 0.4 0.5

Distance along plate, m

100 200 300 400

(T-To), K

Separatrix

Outer divertor

qs

10 MW/m2

L=0.5 m U=10 m/s h=2.3 cm B=10 T To=370 C Tallowable=700 C Surface heating (Tom Rognlein)

No waves Tmax=To+∆T=(350+20)+370=740 C Tallowable=700 C

SLIDE 4

Maximum heat flux allowable

FW heat transfer calculations: Initial data:

L=8.4 m
U=10 m/s
h=2.3 cm
B=10 T
Initial T =350 C
Allowable Tsurf=510 C
uniform surface heat flux
no volumetric heating due to neutrons

Results:

Max. surface heat flux

(without waves)=2.1 MW/m2

Max. surface heat flux

(with waves)=3.2 MW/m2 Divertor heat transfer calculations: Initial data:

L=2 cm / 10 cm / 50 cm
U=10 m/s
h=2.3 cm
B=10 T
Initial T =350 C
Allowable=700 C
uniform surface heat flux
no volumetric heating due to neutrons

Results:

Max. surface heat flux (L=2 cm) = 42 MW/m2
Max. surface heat flux (L=10 cm) = 20 MW/m2
Max. surface heat flux (L=50 cm) = 9.5 MW/m2