High-sensitivity density fluctuation detector

  title={High-sensitivity density fluctuation detector},
  author={Medhat Azzazy and Dariush Modarress and Thomas Hoeft},
A high-sensitivity differential interferometer has been developed to detect small density fluctuations over an optical path length of the order of the boundary layer thickness near transition. Two experimental configurations have been used to evaluate the performance of the interferometer: an open shear-layer configuration and a wind-tunnel turbulent spot configuration. In each experiment small temperature fluctuations were introduced as the signal source. Simultaneous cold-wire measurements… CONTINUE READING