The basement level of the Rhodes Hall engineering building comprises the primary 16,500 sq. ft. research laboratory. The main air supplies for the laboratory feature a high-pressure 1800 psig (13 MPa) always-on air system, and a low pressure 175 psig (1.26 MPa) system. Both systems operate on a pump/storage tank charging configuration. The high pressure system stores up to 22,000 lb of air (10 metric tons), and recharges at a flow-rate of approx. 360 SCFM (0.13 kg/s) in about 8 hours. The low pressure system stores up to 4500 lb (2 metric tons) of air, and recharges in under 2 hours due to a 1450 SCFM, 55 kW variable speed rotary screw compressor. Both exceptional air supplies feature air-dryers with a dew point rating down to -60°C and filtering down to 1 micron.

The extensive air distribution and control system can deliver air to any location in the laboratory, at rates up to 20 kg/s, at precisely controlled pressure, temperature and humidity levels. This capability allows experimentation at Reynolds and Mach numbers that match the operation levels in many gas turbine applications.


The Gas Turbine Combustion and Erosion Laboratory occupies a separate building at the Center Hill Research Facility and is devoted to combustion simulation and erosion studies associated with gas turbine engines. The laboratory has more than 1800 square feet of total floor space in a high bay configuration. The laboratory is comprised of two test cells served by a common control room. Each test cell has access to a low-pressure 1.26 MPa (175 psig) air supply system. The air supply system features a 250 kW variable speed rotary screw air compressor system with a volumetric flow capacity up to 0.84 kg/s (1450 SCFM). The variable speed ability of the compressor system replaces the need for large store tanks. The compressor system employs an air dryer with dual desiccant towers rated down to -40°C dew point. Expansion to the facility is underway with the addition of a mezzanine level to one test cell that will add 250 square feet of additional laboratory test space and the installation of a 400kW electric generator to support the installation of a high-pressure process air heater, providing non-vitiated heated air to a newly installed high pressure combustion test rig.

Please click on the links to the right under FACILITIES for more detailed information on each of the individual test facilities that comprise the GDPL & GTCEL.

Experimental technologies being developed at the GDPL require the ability to precisely and non-instrusively acquire data. The instrumentation used is very diverse in nature in order to achieve this purpose, and must be equal in complement to the quality of the environment being measured. Since our test rigs are designed and manufactured with high data fidelity as a strong component of the program goal, instrumentation quality is important in our investigation and development of new technologies.
Some measurement systems available to GDPL researchers:
  • Stereoscopic High-Speed Particle Image Velocimetry (PIV)
  • Multiple Component Back/Forward Scatter Laser Doppler Velocimetry (LDV)
  • High-Fidelity Arrayed Acoustics & Robotic SPL Mapping
  • Phase Doppler Particle Anemometry (PDPA)
  • Hot-Wire/Film Anemometry (CTA)
  • Planar Laser Induced Flourescense (PLIF)
  • Intensified CCD Chemiluminescence Imaging
  • Schlieren and Shadowgraph with Nano-Pulsed Light Sources
  • Tunable Laser Diode Temperature Sensing
  • Spectroscopic Combustion Emissions Analysis
  • Various Specialized Pitot Probes
Gas Dynamics and Propulsion Laboratory
University of Cincinnati
Dept. of Aerospace Engineering and Engineering Mechanics
300 Rhodes Hall
Cincinnati, OH 45221-0070
© 2005 University of Cincinnati