Calculating Moment of Inertia for Turbine-Compressor Spool

[Bonavaero]

Hi guys, just wanted to know how the moment of inertia of a turbine-compressor spool can be calculated. How about starting with the units as stacks of discs of reducing diameter to the fore.
And also has anyone any idea of the minimum speed (torque) of a GT4088 turbocharger. I couldn't find it on the manufacturer site.

 

[minger]

Typically I would click

Select > Solid Bodies [then]
Mass Properties

Then I would look at the number besides Ixx.

Assuming you don't have a solid model, you can approximate it using analytical equations. Draw a rough cross section and find it analytically assuming solid rings, or shells of revolution.