Gasturbines@SNU

  Measurement of fluid flow characteristics is difficult because any insertion of measuring equipment would disturb the flow. Optical measurement can resolve this limitation. Basic principle of laser diagnostics is the interaction between a target (a molecule or an atom) and a photon. A target could either reflect or absorb the incident photons. The scattered/emitted photons from the target include the information of their origin. Especially, we could infer the intra-structure of a molecule or an atom from the emitted photons from them because energy levels are quantized. Moreover, the distinctive features of laser (monochromaticity, directionality, and coherence) enable the measurement to be more accurate and precise. We are conducting quantitative measurements of flow properties with various techniques, e.g., PLRS, PLIF, or LIBS.