Professor Garris' research interests include the following areas:

1. Turbomachinery: Particulary non-steady flow ejectors utilizing pressure exchange, energy separation devices, turbochargers and turboexpanders.

2. Refrigeration and airconditioning, particularly those using ejectors.

3. Fuel cells including system issues involving turbo-expander pressurization and reformation.

4. Non-steady, compressible fluid mechanics.

5. Experimental methods and instrumentation.

6. Jet propulsion using non-steady flow, including VSTOL .

7. Computational Fluid Mechanics.

The Pressure-Exchange Ejector
Ejector Refrigeration