Improve physical geometry, fluid solvers, audio, and profiling

engines/ltwin.toml

@@ -1,5 +1,5 @@
 # Engine definition. Dimensional keys state their units.
-schema_version = 1
+schema_version = 2
 id = "ltwin"
 name = "916-inspired / 90-degree V twin"
 category = "Twins / V"
@@ -7,9 +7,11 @@ description = "Estimated concept calibration / EFI"
 order = 20
 cycle = "four_stroke"
 
+[simulation]
+cells_per_meter = 20.0
+
 [engine]
 bank_angle_deg = 90.0
-collector_volume_litres = 0.5
 cylinders = 2
 initial_rpm = 1400.0
 initialize_phased_charge = true
@@ -18,7 +20,6 @@ maximum_load_torque_nm = 30.0
 minimum_substeps = 1
 phase_degrees = [0.0, 450.0]
 pipe_damping = 1.0
-plenum_volume_litres = 2.0
 starter_torque_nm = 22.90127
 throttle_diameter_mm = 65.0
 topology = "collector"
@@ -31,18 +32,12 @@ burn_duration_deg = 60.0
 burn_start_deg = 5.0
 compression = 10.0
 energy_variation = 0.05
-exhaust_close_deg = 390.0
-exhaust_open_deg = 130.0
 exhaust_valve_count = 1
 exhaust_valve_diameter_mm = 30.08
-exhaust_valve_lift_mm = 8.46
 fuel_lhv_j_per_kg = 4.4e+07
 heat_transfer = 100.0
-intake_close_deg = 590.0
-intake_open_deg = 340.0
 intake_valve_count = 1
 intake_valve_diameter_mm = 35.72
-intake_valve_lift_mm = 9.4
 misfire_probability = 0.0
 rod_mm = 118.8
 stroke_mm = 66.0
@@ -101,26 +96,208 @@ system = "injection"
 
 [[pipes]]
 id = "intake"
-cells = 4
 diameter_mm = 75.0
-length_mm = 200.0
 
 [[pipes]]
 id = "runners"
 count = 2
-cells = 5
 diameter_mm = 35.0
-length_mm = 250.0
 
 [[pipes]]
 id = "primaries"
 count = 2
-cells = 13
 diameter_mm = 38.0
-length_mm = 650.0
 
 [[pipes]]
 id = "tailpipe"
-cells = 30
 diameter_mm = 60.0
-length_mm = 1500.0
+
+[cam.intake]
+points = [
+  [0.000, 0.000000],
+  [340.000, 0.000000],
+  [345.000, 0.170854],
+  [350.000, 0.644915],
+  [355.000, 1.364429],
+  [360.000, 2.271642],
+  [365.000, 3.308800],
+  [370.000, 4.418150],
+  [375.000, 5.541939],
+  [380.000, 6.622413],
+  [385.000, 7.601818],
+  [390.000, 8.422400],
+  [395.000, 9.026406],
+  [400.000, 9.356083],
+  [402.500, 9.400000],
+  [527.500, 9.400000],
+  [532.500, 9.229146],
+  [537.500, 8.755085],
+  [542.500, 8.035571],
+  [547.500, 7.128358],
+  [552.500, 6.091200],
+  [557.500, 4.981850],
+  [562.500, 3.858061],
+  [567.500, 2.777587],
+  [572.500, 1.798182],
+  [577.500, 0.977600],
+  [582.500, 0.373594],
+  [587.500, 0.043917],
+  [590.000, 0.000000],
+  [720.000, 0.000000]
+]
+
+[cam.exhaust]
+points = [
+  [0.000, 0.000000],
+  [130.000, 0.000000],
+  [135.000, 0.142476],
+  [140.000, 0.539099],
+  [145.000, 1.143660],
+  [150.000, 1.909950],
+  [155.000, 2.791761],
+  [160.000, 3.742886],
+  [165.000, 4.717114],
+  [170.000, 5.668239],
+  [175.000, 6.550050],
+  [180.000, 7.316340],
+  [185.000, 7.920901],
+  [190.000, 8.317524],
+  [195.000, 8.460000],
+  [325.000, 8.460000],
+  [330.000, 8.317524],
+  [335.000, 7.920901],
+  [340.000, 7.316340],
+  [345.000, 6.550050],
+  [350.000, 5.668239],
+  [355.000, 4.717114],
+  [360.000, 3.742886],
+  [365.000, 2.791761],
+  [370.000, 1.909950],
+  [375.000, 1.143660],
+  [380.000, 0.539099],
+  [385.000, 0.142476],
+  [390.000, 0.000000],
+  [720.000, 0.000000]
+]
+
+[valves.intake]
+mass_g = 35.0
+spring_rate_n_per_mm = 38.0
+damping_n_s_per_m = 24.0
+seat_force_n = 75.0
+maximum_lift_mm = 15.0
+seat_restitution = 0.005
+cam_restitution = 0.01
+stop_restitution = 0.01
+
+[valves.exhaust]
+mass_g = 35.0
+spring_rate_n_per_mm = 38.0
+damping_n_s_per_m = 24.0
+seat_force_n = 75.0
+maximum_lift_mm = 15.0
+seat_restitution = 0.005
+cam_restitution = 0.01
+stop_restitution = 0.01
+
+[valve_sound]
+mode_hz = 3600.0
+effective_mass_g = 180.0
+radiation_area_cm2 = 10.0
+damping_ratio = 0.9
+
+[[geometry.cylinders]]
+origin_mm = [ 0, 0, 0 ]
+tilt_deg = -45.0
+
+[[geometry.cylinders]]
+origin_mm = [ 0, 0, 0 ]
+tilt_deg = 45.0
+
+# intake
+[[geometry.pipes]]
+index = 0
+points_mm = [
+  [ -256, 418.5291, 0 ],
+  [ -56, 418.5291, 0 ]
+]
+
+# runners 1
+[[geometry.pipes]]
+index = 1
+points_mm = [
+  [ 0, 383.4546, -80.2802 ],
+  [ 0, 133.4546, -80.2802 ]
+]
+
+# runners 2
+[[geometry.pipes]]
+index = 2
+points_mm = [
+  [ 0, 383.4546, 80.2802 ],
+  [ 0, 133.4546, 80.2802 ]
+]
+
+# primaries 1
+[[geometry.pipes]]
+index = 3
+points_mm = [
+  [ 0, 73.6334, -140.1014 ],
+  [ 0.9822, 57.5171, -149.2024 ],
+  [ 3.7581, 42.9223, -151.9312 ],
+  [ 8.0713, 29.7825, -148.899 ],
+  [ 13.6657, 18.0314, -140.717 ],
+  [ 20.285, 7.6023, -127.9962 ],
+  [ 27.6731, -1.5711, -111.348 ],
+  [ 35.5736, -9.5553, -91.3833 ],
+  [ 43.7303, -16.4169, -68.7134 ],
+  [ 51.887, -22.2222, -43.9495 ],
+  [ 59.7875, -27.0379, -17.7026 ],
+  [ 67.1755, -30.9303, 9.416 ],
+  [ 73.7948, -33.9659, 36.7953 ],
+  [ 79.3892, -36.2112, 63.8239 ],
+  [ 83.7025, -37.7327, 89.8909 ],
+  [ 86.4783, -38.5968, 114.385 ],
+  [ 87.4606, -38.8701, 136.6951 ]
+]
+
+# primaries 2
+[[geometry.pipes]]
+index = 4
+points_mm = [
+  [ 0, 73.6334, 140.1014 ],
+  [ 0.7766, 67.5842, 144.4533 ],
+  [ 2.9712, 61.9218, 148.2705 ],
+  [ 6.3814, 56.5771, 151.588 ],
+  [ 10.8045, 51.4813, 154.4409 ],
+  [ 16.0379, 46.5657, 156.8641 ],
+  [ 21.8791, 41.7612, 158.8927 ],
+  [ 28.1254, 36.9992, 160.5619 ],
+  [ 34.5744, 32.2106, 161.9065 ],
+  [ 41.0233, 27.3267, 162.9617 ],
+  [ 47.2696, 22.2785, 163.7626 ],
+  [ 53.1108, 16.9973, 164.344 ],
+  [ 58.3442, 11.4142, 164.7412 ],
+  [ 62.7673, 5.4602, 164.9891 ],
+  [ 66.1775, -0.9334, 165.1228 ],
+  [ 68.3721, -7.8355, 165.1773 ],
+  [ 69.1487, -15.315, 165.1877 ]
+]
+
+# tailpipe
+[[geometry.pipes]]
+index = 5
+points_mm = [
+  [ 139.685, -55, 176.3802 ],
+  [ 1639.685, -55, 176.3802 ]
+]
+
+[[geometry.volumes]]
+id = "intake_plenum"
+center_mm = [ 0, 418.5291, 0 ]
+size_mm = [ 112, 70.1489, 254.5604 ]
+
+[[geometry.volumes]]
+id = "exhaust_collector"
+center_mm = [ 100, -55, 176.3802 ]
+size_mm = [ 79.3701, 79.3701, 79.3701 ]