run_model only for design points

[benL18]

Hi team,
first of all thanks a lot for developing and maintaining this fantastic tool.
I am starting to work with it to improve my practical experience with engine modelling and it's really great!

one question: how can you run a model only for a new point? let's take the high_bypass turbo fan example

the command prob.run_model() will always run the 3 cases 'DESIGN', 'OD_full_pwr' and 'OD_part_pwr'

how can we run them sequentially in 3 steps: first run DESIGN and then run one case or the other?

I imagine this would speed things up in the generation of decks like @flight-test-engineering has done

thanks a lot for the help
Benoit

[flight-test-engineering]

Hello Benoit,

The DESIGN case, as far as I understand always has to run to define the engine.
Using the high_bypass_turbofan.py example file, I believe that if you just change the contents of this list, you can control what you want:

    for pt in ['OD_full_pwr', 'OD_part_pwr']:

        # initial guesses
        prob[pt+'.balance.FAR'] = 0.02467
        prob[pt+'.balance.W'] = 300
        prob[pt+'.balance.BPR'] = 5.105
        prob[pt+'.balance.lp_Nmech'] = 5000
...