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Challenging Power Density Requirements for Future Fighter APUs
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English
Abstract
Future fighters will require more compact, lighter weight, small gas turbine auxiliary power units (APUs) capable of faster starting, and operation, up to altitudes of 50,000 ft. The US Air Force is currently supporting an Advanced Components Auxiliary Power Unit (ACAPU) research program to demonstrate the technologies that will be required to accomplish projected secondary power requirements for these advanced fighters.
The requirements of the ACAPU Program represent a challenging task requiring significant technical advancements over the current state-of-the-art, prominent among which are:
- Small high heat release high altitude airbreathing combustors.
- High temperature monolithic ceramic and metallic small turbines.
- Capability to operate, and transition from non-airbreathing to airbreathing modes.
This paper discusses these challenging requirements and establishes technology paths to match and exceed the required goals.
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Citation
Rodgers, C. and Shekleton, J., "Challenging Power Density Requirements for Future Fighter APUs," SAE Technical Paper 912177, 1991, https://doi.org/10.4271/912177.Also In
References
- Hammer A. N. et al. “Composite Casting/Bonding Construction of an Air Cooled High Temperature Radial Turbine Wheel” SAE 831519
- Paine C. J. “Dual Flow Compressor” ASME 89-GT-121
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- Shekleton J. R. “Annular Combustor with Tangential Cooling and Injection” 1990
- Shekleton J. R. et al. “Hot Gas Generator” 1990
- Vershure R. W. Rodgers C. “Integrated Power Unit” 1989
- Rodgers C. “Combined Auxiliary and Emergency Power Unit” 1989