title: Flow-velocity measurements with a laser diode array.
abstract: To measure flow velocity, a new technique, laser diode array velocimetry, generates multiple laser spots (four or more) separated by short distances (20-100 mum) at the probe volume. Particles that pass through the probe volume generate a signal that is analyzed by a digital signal processor for frequency content. The product of frequency and laser-to-laser spot separation determines the velocity. Rotating wire and wind-tunnel experiments confirm the performance of the new technique. An error analysis showed that the uncertainties in the processed diode array velocimetry signal frequency were less than 0.3%, and uncertainties in the beam-to-beam separation were less than +/-0.05%.
authors.forename: M
authors.initials: M
authors.lastname: Azzazy
authors.forename: R L
authors.initials: RL
authors.lastname: Potts
authors.forename: L
authors.initials: L
authors.lastname: Zhou
authors.forename: B
authors.initials: B
authors.lastname: Rosow