Issues related to MAP correction of off-design points

[NJC1012]

Dear scholar! When I matched the design points of a high bypass ratio engine model with 0 Mach and 0 altitude, it was difficult to perform off-design point calculations.
Firstly, how to perform off-design point calculations, especially the scaling and correction of MAP, was not seen in the relevant examples. Secondly, when I try to perform off-design point calculations, it is easy to encounter "SolverWarning: 'case1. duct13. out_stat. base_thermo. chem_eq. n' exceptions lower bounds". And "RuntimeWarning: invalid value encoded in sqrt"and"Vsonic=(i ['gamma '] * i ['R'] * i ['Ts']) * * 0.5", may I know how to handle it? Is it due to a problem with the component map?
I urgently need your help. Thank you to the kind person and wish you good luck.

[arushkumarsingh]

Hi NJC,
For map correction, u can read: https://ntrs.nasa.gov/api/citations/20070018165/downloads/20070018165.pdf
For solver convergence, you can read: https://openmdao.github.io/PracticalMDO/Notebooks/Homeworks/Problems/debug_solvers.html

Basically, by changing the initial value for the off-design condition, the code wouldn't throw any warning. But for some very odd off-design conditions, i.e if you are running at the edges of the maps, the solver will again throw out warnings.

I am also working on this code, can we connect?
Thanks!

[NJC1012]

Hi NJC, For map correction, u can read: https://ntrs.nasa.gov/api/citations/20070018165/downloads/20070018165.pdf For solver convergence, you can read: https://openmdao.github.io/PracticalMDO/Notebooks/Homeworks/Problems/debug_solvers.html

Basically, by changing the initial value for the off-design condition, the code wouldn't throw any warning. But for some very odd off-design conditions, i.e if you are running at the edges of the maps, the solver will again throw out warnings.

I am also working on this code, can we connect? Thanks!

Thank you for your help. I'd be happy to connect,My contact details are"[email protected]"，If it's inconvenient, you can also provide your connect information.TAHNKS!

[NJC1012]

Thank you for your help. I'd be happy to connect,My contact details are"[[email protected]].If it's inconvenient, you can also provide your connect information.
Looking forward to your reply.
TAHNKS!