National Aeronautics and Space Administration

Glenn Research Center

Wright Patterson AFB and GE

Thursday, July 19, 2012

The tour of Wright Patterson Air Force Base began in the Combustion & Laser Diagnostics Research Complex (CLDRC). The tour guide began by explaining the different laser diagnostic techniques used in the lab. Following the brief introduction, the group was escorted through the different labs where the tour guide discussed each lab setup, the laser used and the diagnostic technique that was being performed. The CLDRC featured an impressive array of advanced laser technologies, including many one-of-a-kind optical sources and detectors. CLDRC lasers provide broad spectral coverage from the ultraviolet through the visible to the near, mid and far infrared (terahertz-radiation region) for flow visualization and spectroscopic investigations of complex reacting and non-reacting flow fields. Continuous-wave and pulsed (nano-, pico-, and femtosecond) sources are employed in conjunction with various scientific-grade cameras and ultrafast imaging devices to provide tremendous spatial and temporal resolution and data-acquisition bandwidth for critical Air Force applications. For those who are working in the laser diagnostic fields, these lasers are considered to be the holy grail of all lasers. A host of linear and nonlinear optical techniques have been developed and applied, including high-speed digital imaging, emission spectroscopy, planar laser-induced fluorescence (PLIF), laser-induced incandescence (LII), planar Rayleigh scattering (PRS), reactive Mie scattering (RMS), laser Doppler velocimetry (LDV), particle-image velocimetry (PIV), thin-filament pyrometry and velocimetry (TFP, TFV), pressure- and temperature-sensitive paints, spontaneous Raman scattering spectroscopy, coherent anti-Stokes Raman scattering (CARS) spectroscopy, transient-grating spectroscopy (TGS), phase Doppler particle analysis (PDPA), femtosecond ballistic imaging, ultrafast pump-probe spectroscopy, laser-induced polarization spectroscopy (LIPS), picosecond time-resolved laser-induced fluorescence (PITLIF), tunable diode-laser absorption spectroscopy (TDLAS), time-division-multiplexed (TDM) hyperspectral absorption spectroscopy, terahertz time-domain spectroscopy (THz-TDS), and advanced techniques for tomographic reconstruction. This state-of-the-art complex provides unique laboratory tools for experimental characterization of combustion through the development, demonstration and application of advanced laser-based/optical diagnostic techniques. These capabilities are complemented by a suite of specialized modeling and simulation methodologies for assessing and predicting the detailed chemistry and physics of combustion processes.

After completing the tour of the Combustion & Laser Diagnostics Research Complex, the group traveled to the High Pressure Combustion Research Facility to view multiple combustion rigs. These rigs are similar to the combustion rigs at Glenn Research Center combustion building. The tour concluded in the Air Force museum hangar where experimental and the Presidential planes reside.

Friday, July 20, 2012

The tour of General Electric (GE) Aviation began with a presentation on the main aspects of GE. After the GE overview concluded, the Aeronautics Academy RAs presented their team projects to GE technical and senior management personnel. Each team of RAs were given sufficient time to discuss their project and answer questions. Lunch followed the presentations. The conclusion of lunch was followed by a tour of some of the facilities at GE. The facilities toured included a compressor and turbine testing lab, and a high- and low-pressure combustion lab. The combustion labs, similar to those at Wright Patterson, were used to test new fuel injector designs. The GE tour included discussion of the history of GE and aircraft engines. This was preceded by a presentation by two GE interns who discussed their projects for the summer.