hyperloop.Python package

Subpackages

Submodules

hyperloop.Python.LIM module

Model for a Single Sided Linear Induction Motor(SLIM), using Circuit Model.

Evaluates thrust generated by a single, single sided linear induction motor using the simplified circuit model. Inspired from the paper: DESIGN OF A SINGLE SIDED LINEAR INDUCTION MOTOR(SLIM) USING A USER INTERACTIVE COMPUTER PROGRAM

class hyperloop.Python.LIM.Thrust[source]

Bases: openmdao.core.component.Component

acceleration(P1, c_time, mass)[source]

Sub-module used to calculate acceleration using following eq. acceleration = (P1 / (2*mass*c_time))^0.5

omega(f, L)[source]

Sub-module used to calculate omega using following eq. omega = 2*pi*f*L

phase_angle_calc(f, L, R1)[source]

Sub-module used to calculate phase angle using following eq. phi = arctan((2*pi*f*L) / R1)

reactance_of_inductor(f, L)[source]

Sub-module used to calculate reactance of inductor using following eq. slip = 2*pi*f*L

slip_ratio(V_s, V_r)[source]

Sub-module used to calculate slip ratio using following eq. slip = (V_s - V_r) / V_s

solve_nonlinear(params, unknowns, resids)[source]

hyperloop.Python.angular_velocity321 module

class hyperloop.Python.angular_velocity321.AngularVelocity321[source]

Bases: openmdao.core.component.Component

Params:

Yaw : float

Yaw angle (3-axis rotation) of body frame with respect to the inertial NED frame. Default value is 0.0 rad

Pitch : float

Pitch angle (2-axis rotation) of body fram with respect to the inertial NED frame. Default value is 0.0 rad

Roll : float

Roll angle (1-axis rotation) of body fram with respect to the inertial NED frame. Default value is 0.0 rad

Yaw rate : float

Yaw rate of pod body frame. Default value is .01 rad/s

Pitch rate : float

Pitch rate of pod body frame. Default value is .01 rad/s

Roll rate : float

Roll rate of pod body frame. Default value is 0.0 rad/s
Returns:

Angular velocity : float

Returns the body fame angular velocity of the pod in rad/s

Notes

Evaluates the body frame angular velocity from 321 Euler angles and their derivatives Units are in radians and radians/s

solve_nonlinear(p, u, r)[source]
Params:

Yaw : float

Yaw angle (3-axis rotation) of body frame with respect to the inertial NED frame. Default value is 0.0 rad

Pitch : float

Pitch angle (2-axis rotation) of body fram with respect to the inertial NED frame. Default value is 0.0 rad

Roll : float

Roll angle (1-axis rotation) of body fram with respect to the inertial NED frame. Default value is 0.0 rad

Yaw rate : float

Yaw rate of pod body frame. Default value is .01 rad/s

Pitch rate : float

Pitch rate of pod body frame. Default value is .01 rad/s

Roll rate : float

Roll rate of pod body frame. Default value is 0.0 rad/s
Returns:

Angular velocity : float

Returns the body fame angular velocity of the pod in rad/s

Notes

omega = [[s(psi)*s(theta), c(psi), 0], [c(psi)*s(theta), -s(psi), 0], [c(theta), 0,1]] * [[phi], [theta], [psi]]

hyperloop.Python.boundary_layer_sensitivity module

class hyperloop.Python.boundary_layer_sensitivity.BoundaryLayerSensitivity[source]

Bases: openmdao.core.component.Component

Params:

gam : float

Ratio of specific heats. Default value is 1.4

R : float

Ideal gas constant. Default valut is 287 J/(m*K).

A_pod : float

cross sectional area of the pod. Default value is 1.4 m**2. Value will be taken from pod geometry module

comp_inlet_area : float

Inlet area of compressor. (m**2)

L : float

Pod length. Default value is 22 m. Value will be taken from pod geometry module

prc : float

Pressure ratio across compressor inlet and outlet. Default value is 12.5. Value will be taken from NPSS

p_tube : float

Pressure of air in tube. Default value is 850 Pa. Value will come from vacuum component

T_ambient : float

Tunnel ambient temperature. Default value is 298 K.

mu : float

Fluid dynamic viscosity. Default value is 1.846e-5 kg/(m*s)

M_duct : float

Maximum Mach number allowed in the duct. Default value is .95

M_diff : float

Maximum Mach number allowed at compressor inlet. Default valu is .6

cp : float

Specific heat of fluid. Default value is 1009 J/(kg*K)

M_pod : float

pod Mach number. Default value is .8

length_calc : bool

True calculates boundary layer thickness. False takes boundary layer thickness as an input. Default value is false.
Returns:

A_tube : float

will return optimal tunnel area based on pod Mach number

pwr_comp : float

will return the power that needs to be delivered to the flow by the compressor. Does not account for compressor efficiency

A_bypass : float

will return area of that the flow must go through to bypass pod

A_inlet : float

returns area of the inlet necessary to slow the flow down to M_diffuser

A_duct_eff : float

returns effective duct area which accounts for displacement boundary layer thickness approximation

A_diff : float

returns area of diffuser outlet

Re : float

returns free stream Reynolds number

Notes

Component is not a part of the system model, but is instead intended to analyze the sensitivity of tube area to the bounday layer thickness over the pod. Can be made to calculatee based on Reynolds number accourding to flat plate assumption or to vary boundary layer to account for boundary layer suction or some other version of flow control.

solve_nonlinear(params, unknowns, resids)[source]

hyperloop.Python.sample_mission module

hyperloop.Python.ticket_cost module

class hyperloop.Python.ticket_cost.TicketCost[source]

Bases: openmdao.core.component.Component

Params:

length_cost : float

Cost of materials per unit length. Default value is 2.437e6 USD/km

pod_cost : float

Cost per individual pod. Default value is 1.0e6 USD.

capital_cost : float

Estimate of overhead capital cost. Default value is 1.0e10 USD.

energy_cost : float

Cost of electricity. Default value is .13 USD/kWh

ib : float

Bond interest rate. Default value is .04

bm : float

Bond maturity. Default value is 20.0 years.

operating_time : float

operating time per day. Default value is 16.0*3600 s

JtokWh : float

Convert J to kWh. Default value is J/kWh

m_pod : float

Pod mass. Default value is 3100 kg

n_passengers : float

Number of passengers. Default value is 28.0

pod_period : float

Time in between pod departures. Default value is 120.0 s

avg_speed : float

average pod speed. Default value is 286.86 m/s

track_length : float

length of the track. Default value is 600e3 m

pod_power : float

Power consumption of the pod. Default value is 1.5e6 W

prop_power : float

power of an individual propulsion section. Default value is 350e3 W

vac_power : float

Power of the vacuum pumps. Default value is 71.049e6 W

alpha : float

percent of vacuum power used in steady state. Default value is .0001

vf : float

Pod top speed. Default value is 286.86 m/s

g : float

Gravity. Default value is 9.81 m/s/s

Cd : float

Pod drag coefficient. Default value is .2

S : float

Pod planform area. Default value is 40.42 m**2

p_tunnel : float

Tunnel pressure. Default value is 850.0 Pa

T_tunnel : float

Tunnel temperature. Default value is 320 K

R : float

Ideal gas constant. Default value is 287 J/kg/K

eta : float

Efficiency of propulsion system

D_mag : float

Magnetic drag. Default value is (9.81*3100.0)/200.0 N

thrust_time : float

Time spent during a propulsive section. Default value is 1.5 s

prop_period : float

distance between pripulsion sections. Defualt value is 25.0e3 km
Returns:

ticket_cost : float

cost of individual ticket. Default value is 0.0 USD

prop_energy_cost : float

cost of energy used by propulsion section per year. Default value is 0.0 USD

Notes

This Component takes into account various cost figures from the system model and combines them to estimate tickt cost per passenger.

solve_nonlinear(p, u, r)[source]

hyperloop.Python.tube_and_pod module

Module contents