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♻️ Refactor TF coil stress calculations to use a_cs_poloidal a… #3986

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♻️ Refactor TF coil stress calculations to use a_cs_poloidal a… #3986

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3 changes: 1 addition & 2 deletions process/resistive_tf_coil.py
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Original file line number Diff line number Diff line change
Expand Up @@ -131,8 +131,6 @@ def run(self, output: bool):
int(tfcoil_variables.i_tf_bucking),
float(build_variables.r_tf_inboard_in),
build_variables.dr_bore,
build_variables.z_tf_inside_half,
pfcoil_variables.f_z_cs_tf_internal,
build_variables.dr_cs,
build_variables.i_tf_inside_cs,
build_variables.dr_tf_inboard,
Expand Down Expand Up @@ -192,6 +190,7 @@ def run(self, output: bool):
tfcoil_variables.a_tf_coil_inboard_case,
tfcoil_variables.vforce,
tfcoil_variables.a_tf_turn_steel,
pfcoil_variables.a_cs_poloidal,
)

tfcoil_variables.sig_tf_case = (
Expand Down
3 changes: 1 addition & 2 deletions process/superconducting_tf_coil.py
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Original file line number Diff line number Diff line change
Expand Up @@ -155,8 +155,6 @@ def run(self, output: bool):
int(tfcoil_variables.i_tf_bucking),
float(build_variables.r_tf_inboard_in),
build_variables.dr_bore,
build_variables.z_tf_inside_half,
pfcoil_variables.f_z_cs_tf_internal,
build_variables.dr_cs,
build_variables.i_tf_inside_cs,
build_variables.dr_tf_inboard,
Expand Down Expand Up @@ -216,6 +214,7 @@ def run(self, output: bool):
tfcoil_variables.a_tf_coil_inboard_case,
tfcoil_variables.vforce,
tfcoil_variables.a_tf_turn_steel,
pfcoil_variables.a_cs_poloidal,
)

tfcoil_variables.sig_tf_case = (
Expand Down
20 changes: 5 additions & 15 deletions process/tf_coil.py
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Original file line number Diff line number Diff line change
Expand Up @@ -3138,8 +3138,6 @@ def stresscl(
i_tf_bucking,
r_tf_inboard_in,
dr_bore,
z_tf_inside_half,
f_z_cs_tf_internal,
dr_cs,
i_tf_inside_cs,
dr_tf_inboard,
Expand Down Expand Up @@ -3199,6 +3197,7 @@ def stresscl(
a_tf_coil_inboard_case,
vforce,
a_tf_turn_steel,
a_cs_poloidal,
):
"""TF coil stress routine

Expand Down Expand Up @@ -3335,21 +3334,12 @@ def stresscl(
# as the TF is called before CS in caller.f90
# -#

# CS vertical cross-section area [m2]
if i_tf_inside_cs == 1:
a_oh = (
2.0e0
* z_tf_inside_half
* f_z_cs_tf_internal
* (dr_bore - dr_tf_inboard)
)
else:
a_oh = 2.0e0 * z_tf_inside_half * f_z_cs_tf_internal * dr_cs

# Maximum current in Central Solenoid, at either BOP or EOF [MA-turns]
# Absolute value
curr_oh_max = (
1.0e-6 * np.maximum(j_cs_flat_top_end, j_cs_pulse_start) * a_oh
1.0e-6
* np.maximum(j_cs_flat_top_end, j_cs_pulse_start)
* a_cs_poloidal
)

# Number of turns
Expand All @@ -3360,7 +3350,7 @@ def stresscl(
)

# CS Turn vertical cross-sectionnal area
a_cs_turn = a_oh / n_oh_turns
a_cs_turn = a_cs_poloidal / n_oh_turns

# CS coil turn geometry calculation - stadium shape
# Literature: https://doi.org/10.1016/j.fusengdes.2017.04.052
Expand Down
13 changes: 4 additions & 9 deletions tests/unit/test_tfcoil.py
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Original file line number Diff line number Diff line change
Expand Up @@ -852,7 +852,7 @@ class StressclParam(NamedTuple):

dr_cs_tf_gap: Any = None

z_tf_inside_half: Any = None
a_cs_poloidal: Any = None

r_tf_inboard_in: Any = None

Expand Down Expand Up @@ -962,8 +962,6 @@ class StressclParam(NamedTuple):

f_a_cs_turn_steel: Any = None

f_z_cs_tf_internal: Any = None

j_cs_flat_top_end: Any = None

j_cs_pulse_start: Any = None
Expand Down Expand Up @@ -1031,9 +1029,9 @@ class StressclParam(NamedTuple):
r_tf_inboard_mid=3.5979411851091103,
dr_bore=2.3322000000000003,
dr_cs=0.55242000000000002,
z_tf_inside_half=9.0730900215620327,
r_tf_inboard_in=2.9939411851091102,
casestr=0,
a_cs_poloidal=9.021881501,
n_tf_coil_turns=200,
dr_tf_wp_with_insulation=0.54261087836601019,
i_tf_tresca=0,
Expand Down Expand Up @@ -1086,7 +1084,6 @@ class StressclParam(NamedTuple):
n_tf_wp_stress_layers=5,
i_pf_conductor=0,
f_a_cs_turn_steel=0.57874999999999999,
f_z_cs_tf_internal=0.90000000000000002,
j_cs_flat_top_end=20726000,
j_cs_pulse_start=0,
n_pf_coils_in_group=np.array(
Expand Down Expand Up @@ -1154,10 +1151,10 @@ class StressclParam(NamedTuple):
r_tf_inboard_mid=3.5979411851091103,
dr_bore=2.3322000000000003,
dr_cs=0.55242000000000002,
z_tf_inside_half=9.0730900215620327,
r_tf_inboard_in=2.9939411851091102,
casestr=0.00094360452596334093,
n_tf_coil_turns=200,
a_cs_poloidal=9.021881501,
dr_tf_wp_with_insulation=0.54261087836601019,
i_tf_tresca=0,
a_tf_turn_cable_space_no_void=0.001293323051622732,
Expand Down Expand Up @@ -1209,7 +1206,6 @@ class StressclParam(NamedTuple):
n_tf_wp_stress_layers=5,
i_pf_conductor=0,
f_a_cs_turn_steel=0.57874999999999999,
f_z_cs_tf_internal=0.90000000000000002,
j_cs_flat_top_end=20726000,
j_cs_pulse_start=19311657.760000002,
n_pf_coils_in_group=np.array(
Expand Down Expand Up @@ -1327,8 +1323,6 @@ def test_stresscl(stressclparam, monkeypatch, tfcoil):
stressclparam.i_tf_bucking,
stressclparam.r_tf_inboard_in,
stressclparam.dr_bore,
stressclparam.z_tf_inside_half,
stressclparam.f_z_cs_tf_internal,
stressclparam.dr_cs,
stressclparam.i_tf_inside_cs,
stressclparam.dr_tf_inboard,
Expand Down Expand Up @@ -1388,6 +1382,7 @@ def test_stresscl(stressclparam, monkeypatch, tfcoil):
stressclparam.a_tf_coil_inboard_case,
stressclparam.vforce,
stressclparam.a_tf_turn_steel,
stressclparam.a_cs_poloidal,
)

assert casestr == pytest.approx(stressclparam.expected_casestr, rel=0.01)
Expand Down
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