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Input/output files

optim_params.cfg

This configuration file is all the user needs to modify to setup a nozzle optimization. It makes it possible to:

• define a hierarchy of fidelity levels (governing equations, mesh resolution, error tolerance etc.),
• define the input design variables to the model (e.g. control points, flow conditions) and the output functions (thrust, cycles to failure, etc.),
• specify various parameters to the simulation: mission, nozzle structure (number of baffles), parallel options, I/O format, etc.

input_dv.dat

This file is the interface between the nozzle model and the optimizer. It provides the list of input design variables, which must be consistent with those defined in the .cfg file. It can be a Dakota file (params.in), in which case it also specifies whether to compute gradients.