Robust Operation and Performance Limiting Mechanisms in Kilowatt-Scale High-Speed Gas Turbine Engines
Advisor: Dr. Choon Tan
We are researching small gas turbine engines for remote power generation applications. Fuel-based energy systems can provide a much higher energy density than battery-electric systems, making them ideal candidates for portable power systems, such as unmanned aerial vehicles and autonomous robots. Traditionally, applications in the kilowatt scale would be filled by reciprocating piston engines. Here, we study the potential use of gas turbine engines in the kilowatt scale. Gas turbines have the potential for higher power density, superior mechanical reliability, and greater fuel flexibility when compared to piston engines. The primary challenges are ensuring stable operation and acceptable efficiency.
We have set up an experimental gas turbine engine on a test stand in the lab. This engine produces up to 2kW of power at speeds of over 200,000 RPM. Using this setup, we are measuring engine performance properties (like power output and fuel efficiency) as well as operational properties (like bearing temperatures and rotordynamic whirl). These measurements will allow us to quantify the limits of robust operation for kW-scale gas turbines and to determine how these limits might change as engines are scaled up and down. This scaling relationship is important in determining which applications will be suitable for small gas turbine engines. This facility was constructed with funding from the Air Force Office of Scientific Research.