ax = plt.subplot(1, 1, 1)
ax.set_xlabel('Wind Speed (knots)')
ax.set_ylabel('Blade Speed (rpm)')
import time
start_time = time.time()
i = 0
path = glob(r'C:\Users\mlip814\airfoil_data\airfoil_data\*')[56]
airfoil = Airfoil.from_folder(path, 100000, 9)
for n in (2, 3, 6, 12):
blade = Blade(airfoil, n)
torque = resistance(blade_speed) / n # (per blade)
blade.design(knots(10), torque, rpm(140))
wind_speeds = np.linspace(8, 12, 20)
results = [
blade.solve(knots(wind_speed), system) for wind_speed in wind_speeds
]
blade_speeds = [rads(result[0]) for result in results]
ax.plot(wind_speeds, blade_speeds, label=str(n))
ax.legend()
print(time.time() - start_time)
if input('Save?') != '':
plt.savefig('image_n_blades.png')
plt.show()
def rads(x):
return x / 0.1047
wind_speed = knots(10)
blade_speed = rpm(140)
torque = resistance(blade_speed) / 3 # (per blade)
system = (0.945, resistance)
path = r'C:\Users\mlip814\airfoil_data\airfoil_data\ag17-il'
airfoil = Airfoil.from_folder(path, 100000, 9)
blade = Blade(airfoil, 3)
blade.design(wind_speed, torque, blade_speed)
blade_speeds = np.linspace(rpm(90), rpm(180), 10)
torques = [
blade.simulate(wind_speed, blade_speed) * 3 for blade_speed in blade_speeds
]
resistances = [resistance(blade_speed) for blade_speed in blade_speeds]
ax = plt.subplot(1, 2, 1)
ax.plot(blade_speeds, torques, label='Torque Output')
ax.plot(blade_speeds, resistances, label='Resistance')
ax.legend()
ax.set_xlabel('Blade Speed (rad/s)')
ax.set_ylabel('Torque (nm)')
