Novel Inlet Protection System for Auxiliary Power Units

The proposed Inlet Protection System (IPS) concept includes advanced T800 features and potential implementation of Electrostatic Particle Separation (EPS) technology. It is retrofitable into existing installations as well as integratable into future APU/SPU engines. CFDRC proposes an experimental/analytical team for CFDRC, Garrett Auxiliary Power Division (GAPD), and the University of Cincinnati (UC). The Phase I program includes: 1. application if GAPD IPS design procedures to assist in focusing CFDRC's proposed base line concept test program at UC; 2. IPS analytical wall contour optimization with and without implementation of EPS technology using advanced CFD analysis; 3. preliminary assessment and specification of scavenge requirements; and 4. documentation of CFD technology utilized to refine the IPS concept proposed here. Application of CFD technology during Phase I is expected to assist in early minimization of first stage compressor rotor excitation sources due to IPS inlet flow distortion. Phase II will consist of IPS prototype detailed design, fabrication, and sand removal efficiency testing. GAPD will assist CFDRC in assessment and implementation of all U.S. Army airworthiness requirements.