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.

 

[NatSusan]

Hi there! Calculating the moment of inertia for a turbine-compressor spool can be done by using the formula I = Σmr², where I is the moment of inertia, Σ is the sum of all the individual masses (m) multiplied by the square of their respective distances from the axis of rotation (r). In this case, you can think of the spool as a stack of discs of reducing diameter, with each disc having a mass (m) and a distance (r) from the axis. By summing up all the individual moments of inertia for each disc, you can get the total moment of inertia for the spool.

As for the minimum speed (torque) of a GT4088 turbocharger, it's best to contact the manufacturer directly for that information. They should have specifications or technical documents available that can provide the minimum speed and torque values for the turbocharger. Hope this helps!