Question

Honeycomb Flow Straightener Anti-Turbulence Screens Silencer Fan Test Section Diffuser Iniet S The wind tunnel shown above is; a) open circuit/suction/low speed wind tunnel b) open circuit/blow-down/low speed wind tunnel c) closed circuit/suction/supersonic wind tunnel d) closed circuit/blow-down/supersonic wind tunnel

Answer 1

The figure represent an open circuit suction type low speed wind tunnel. Like closed circuit wind tunnel open circuit tunnels do not directly recirculate air. For a suction type, honeycomb is used to straighten the airflow (directing). The air gathered from the room in which the tunnel is installed then passes through the test section is returned back through the tunnel fan located downstream . Both honeycomb and screens are used before contraction to reduce turbulence in the flow along with diffuser to reduce loss due to kinetic energy.