Indoor low speed air jet flow: fibre film probe measurements.

This paper presents results belonging to a larger investigation on low velocity indoor air jets. The experiment is undertaken in a climate room where an isothermal air jet is issued from the centre of one lateral wall. Measurements are performed with a single fiber film probe, and with Particle Streak Velocimetry system. With Particle, Streak Velocimetry has been developed a three dimensional analysis of the instantaneous velocity field. With the use of fiber filmprobe, the fluid-dynamics of the jet flow is explored in terms of mean longitudinal velocity, and relative turbulence intensity. This paper treats exclusively the results obtained with the fiber film probe from the measurements along the centre-line of the jet flow. The investigation deals with a number of test cases of practical value for designing supply to provide air at low speed directly to the occupied zone.