pterasoftware.steady_ring_vortex_lattice_method¶

Contains the SteadyRingVortexLatticeMethodSolver class.

Classes¶

SteadyRingVortexLatticeMethodSolver

A class used to solve SteadyProblems with the ring vortex lattice method.

Module Contents¶

class pterasoftware.steady_ring_vortex_lattice_method.SteadyRingVortexLatticeMethodSolver(steady_problem: pterasoftware.problems.SteadyProblem)[source]¶

A class used to solve SteadyProblems with the ring vortex lattice method.

Contains the following methods:

run: Runs the solver on the SteadyProblem.

calculate_solution_velocity: Finds the fluid velocity (in the first Airplane’s geometry axes, observed from the Earth frame) at one or more points (in the first Airplane’s geometry axes, relative to the first Airplane’s CG) due to the freestream velocity and the induced velocity from every RingVortex and HorseshoeVortex.

Citation:

Adapted from: aerodynamics.vlm3.py in AeroSandbox

Author: Peter Sharpe

Date of retrieval: 04/28/2020

Parameters:: steady_problem – The SteadyProblem to be solved.
Returns:: None

run() → None[source]¶

Runs the solver on the SteadyProblem.

Returns:: None

calculate_solution_velocity(stackP_GP1_CgP1: numpy.ndarray | collections.abc.Sequence[collections.abc.Sequence[float | int]], bound_singularity_counts: numpy.ndarray | None = None) → numpy.ndarray[source]¶

Finds the fluid velocity (in the first Airplane’s geometry axes, observed from the Earth frame) at one or more points (in the first Airplane’s geometry axes, relative to the first Airplane’s CG) due to the freestream velocity and the induced velocity from every RingVortex and HorseshoeVortex.

When an image surface is defined on the OperatingPoint, the returned velocity also includes the induced velocity from image RingVortices and image HorseshoeVortices reflected across that surface.

Notes:

This method assumes that the correct strengths for the RingVortices and HorseshoeVortices have already been calculated and set.

Parameters:

stackP_GP1_CgP1 – An array-like object of numbers (int or float) with shape (N,3) representing the positions of the evaluation points (in the first Airplane’s geometry axes, relative to the first Airplane’s CG). Can be a tuple, list, or ndarray. Values are converted to floats internally. The units are in meters.
bound_singularity_counts – An optional (4,) ndarray of int64 for accumulating singularity event counts from bound RingVortices and HorseshoeVortices. If None, counts are discarded.

Returns:

A (N,3) ndarray of floats representing the velocity (in the first Airplane’s geometry axes, observed from the Earth frame) at each evaluation point due to the summed effects of the freestream velocity and the induced velocity from every RingVortex and HorseshoeVortex. The units are in meters per second.