Calculating Moment of Inertia for Turbine-Compressor Spool

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SUMMARY

The moment of inertia for a turbine-compressor spool can be calculated using the method of stacks of discs with reducing diameters. For practical calculations, users can utilize SolidWorks by selecting Solid Bodies and then accessing Mass Properties to find the Ixx value. In the absence of a solid model, analytical equations can be employed, approximating the spool as solid rings or shells of revolution. Additionally, the minimum speed (torque) specifications for the GT4088 turbocharger were not available on the manufacturer's site, indicating a need for further research or direct manufacturer inquiry.

PREREQUISITES
  • Understanding of moment of inertia calculations
  • Familiarity with SolidWorks software
  • Knowledge of analytical methods for mechanical components
  • Basic principles of turbocharger operation
NEXT STEPS
  • Research SolidWorks Mass Properties functionality
  • Study analytical equations for calculating moment of inertia
  • Investigate the specifications and performance characteristics of the GT4088 turbocharger
  • Explore methods for modeling solid rings and shells of revolution in mechanical design
USEFUL FOR

Mechanical engineers, CAD designers, and anyone involved in the design and analysis of turbine-compressor systems.

Bonavaero
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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.
 
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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.
 

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