3D-PTV measurements of jet flow between parallel flat plates

Jet flow in between parallel flat plates was studied experimentally. The plates were rectangular, and separated by a gap H (=10mm). The nozzle having a square cross-section with a side length of B (=H) was installed at an edge of the parallel plates and air was issued into the gap. We used the three-dimensional particle tracking velocimetry (3D-PTV) to measure the velocity field. We used four cameras to measure three dimensional and three components of velocity vectors. Velocity profile at central plane between the plates has self-similarity along the streamwise direction and agrees well with Goertler’s solution and Tolmien’s solution of the planar free jet. Centerline velocity U_CL decays more rapidly than that of the planar free jet due to the secondary flow has occurred in the near field and the wall friction.