emissions

class description

class emissions.Emissions(**kwargs)

Bases: openmdao.core.explicitcomponent.ExplicitComponent

Compute emission characteristics of engine on the trajectory.

The Emissions component requires the following inputs:

• inputs['Tti_c_star']: combustor inlet temperature (re. T_0) [-]

• inputs['Pti_c_star']: combustor inlet pressure (re. p_0) [-]

• inputs['W_f']: engine fuel flow [kg/s]

• inputs['p_0']: ambient pressure [Pa]

• inputs['T_0']: ambient temperature [K]

• inputs['t_s']: source time [s]

The Emissions component computes the following outputs:

• outputs['EINOx']: NOx emission index [g/kg fuel]

• outputs['m_NOx']: Total mass of NOx emitted on the trajectory [kg]

compute(inputs: openmdao.vectors.default_vector.DefaultVector, outputs: openmdao.vectors.default_vector.DefaultVector)

Compute outputs given inputs. The model is assumed to be in an unscaled state.

Parameters

• inputs (Vector) – Unscaled, dimensional input variables read via inputs[key].

• outputs (Vector) – Unscaled, dimensional output variables read via outputs[key].

• discrete_inputs (dict or None) – If not None, dict containing discrete input values.

• discrete_outputs (dict or None) – If not None, dict containing discrete output values.

compute_partials(inputs, partials)

Compute sub-jacobian parts. The model is assumed to be in an unscaled state.

Parameters

• inputs (Vector) – Unscaled, dimensional input variables read via inputs[key].

• partials (Jacobian) – Sub-jac components written to partials[output_name, input_name]..

• discrete_inputs (dict or None) – If not None, dict containing discrete input values.

initialize()

Perform any one-time initialization run at instantiation.

setup()

Declare inputs and outputs.

Available attributes:

name pathname comm options

theory

The combustor emissions along the trajectory are computed using the \(P_3-T_3\) method.