In developing the dual etalon frequency comb (DEFCOM) spectrometer, CRF researchers Haifeng Huang and David Chandler are refining a new concept for time-resolved Fourier-transform (FT) spectroscopy based on the interference between two transient frequency combs. By opening the door to many potential uses—including time-resolved, high-resolution, broad-band spectroscopy with a microsecond time-scale—DEFCOM may prove instrumental in…
On April 23, a group of combustion researchers from the United Technologies Research Center (UTRC) visited the CRF. Led by manager Dr. Catalin Fotache, the UTRC researchers met with senior managers Art Pontau and Andy McIlroy, manager Daniel Dedrick, and others to speak about experimental diagnostics, modeling and simulation with respect to turbine engines.
The CRF has a long and distinguished history of performing laser diagnostic measurements in turbulent flames and documenting the processed data and corresponding boundary conditions in an online database accessible to modelers. Because of the desire for highly refined measurements of species concentrations and local temperature (using combined Rayleigh and Raman scattering), these measurements have…