High-Bandwidth Aeromechanical Identification Methodology (AIM)Technology for Military Turbomachinery
Abstract
FY21 funds added for: Turbomachinery flutter and excessive high-cycle fatigue (HCF) are fundamental design challenges in modern jet engines, both military and commercial. A key step in their mitigation is a better understanding of aeromechanical damping: negative or very low damping is the primary indicator of flutter and HCF risk. Direct measurement of aeromechanical damping provides both ch aracterization of nominal designs and a quantitative sensitivity assessment of effects such as erosion, blade incidence, FOD, blendi ng, steam ingestion, among many others. These effects areparticularly relevant in harsh environments in which naval aircraft operat e. The University of Central Florida (UCF), collaborating closely with Raytheon Technologies Research Corporation (RTRC), proposes t o pool our collective expertise to address two key gaps in the state of the art: -The team shall develop next-generation high aut hority actuators to overcome currentlimitations in damping measurement systems and extend their applicability to military fans and compressors- The team shall develop resonant stress predictive capability for mistuned rotors.This programs final task is an ex perimental study to characterize and validate the selected actuator mechanisms against realistic impedances, including tuned or mist uned rotor geometries, for use in next-generation damping measurement systems. Based on the results of this task, the project shall also produce a plan for a full-scale or scaled test of a realistic fan or compressor rotor at relevant conditions in an appropriate facility to benefit both future naval applications such as the NGAD program, and the broader turbomachinery community. In doing so, this project aims to reduce both risk in future engine testing and cost/schedule of design iterations in engine development. Overal l, the program will enable an unparalleled advance in the understanding of aeromechanics of military fans and compressors, with part icular relevance to naval aviation.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Aug 20, 2021
- Source ID
- N000142112621
Entities
People
- Jeffrey L. Kauffman
Organizations
- Office of Naval Research
- United States Navy
- University of Central Florida Board of Trustees