Optimization process for an industrial ventilation system installed inside a sludge dehydration hall

Numerical and experimental study of the International Space Station crew quarters ventilation

“…Obtaining flow fields using Particle Image Velocimetry (PIV) from a full-scale CQ model is impossible due to constructive constraints (lack of physical space inside the CQ, no transparent surface through which to capture the PIV flow fields). The authors' research team uses optical methods such as Particle Image Velocimetry (PIV) in one of our research directions, dedicated to the use of reduced scale physical models [12,13], allowing to work easily with such type of measurement tools that would allow for adapted dimensions of the region of interest to obtain high resolution velocity fields [14][15][16][17]. This type of approach must, however, comply with certain conditions of similarity.…”

“…The perpendicular outlet introduces additional head losses in the system as opposed to a location on the opposite wall of the axial fan, and allows us to better measure pressure differences. This set-up was not chosen arbitrarily, a similar one was used by NASA during the design of the CQ for the characterization of the same axial fans [12]. The flow rate was varied by means of circular orifice plates of various known diameters -D exhaust , varying in 1 cm increments between a diameter of 11 cm, approximately equal to that of the fan, and 0 cm which means a closed flat plate corresponding to the null flow state.…”