Aachen turbine test case (#139)

* Adding Aachen turbine folder

* adding coarse mesh

* adding stator 1 restart

* adding rotor restart

* adding stator 2 restart

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Co-authored-by: A Cappiello <alessandrocappiello@MBPdiAlessandro.Home>
Co-authored-by: A Cappiello <alessandrocappiello@mbpdialessandro.kpn>

Author: 3 people