gambit turbo file format
 

can anyone tell me how to create a turbo file for gambit(filename.tur)?
my homework is to study airflow around a fan blade.
i know the geometry of the blade,but how to create the turbo file?
i would appreciate any help or information.
i didn't find any tutorial about creating turbo files.
i need this information freally bad, the end of the semester is close.
thanks