ABSTRACT
This paper delivers a description of modeling and constructing a small, low Reynolds number, open loop, subsonic wind tunnel. It also briefly discusses a process to generate smokes for visualizing the invisible air while passing over a bluff body. This work mainly aims at understanding the factors influence the design of a wind tunnel, pointing out what errors might have associated with the experimental data during the experiment, and getting practical knowledge on the factors needs to be considered while constructing a fluid machinery. In this wind tunnel, when the air is sucked by an induced draft fan and started passing over the solid bluff body placed inside the tunnel, an electrically heated metal tip vaporizes glycerin in order to create dense smoke for visualizing the flow fields and streamline around the body. In this wind tunnel, the maximum useful speed of the air is 7.1 m/s at a Reynolds number of 1065.
