Prime Photonics is working on the development of an inlet distortion measurement system based on filtered Rayleigh Scattering (FRS).

The goals of this research program are to:

  • Identify and characterize swirl conditions for gas turbine engine inlets
  • Develop a compact, low-cost FRS system suitable for ground-based test (near-term) and on-wing distortion characterization (mid-term)

In cooperation with Virgina Tech, the team is developing scalable methods to measure planar velocity, temperature, and pressure of flows.

The velocimetry portion is extremely robust, with high spatial resolution and velocity uncertainties in the order of 1 m/s.

Scalar measurements are less mature but developing rapidly:

  • Temperature uncertainty in the order of +/- 3K
  • Pressure uncertainty of +/- 500 Pa

Rayleigh Scattering is a wave optics phenomenon resulting from the interaction of light and matter on the scale or smaller than the wavelength of the light.  All information needed for temperature, pressure, and velocity measurement is contained within the Rayleigh scattered light signal.  Particle scattering and reflections are much stronger than the Rayleigh signal.  Filtered Rayleigh scattering is a means to measure the spectrum of the Rayleigh signal.

Contact Us to learn more about our research on inlet distortion measurement