| 摘要 |
PROBLEM TO BE SOLVED: To provide a smoke exhaust device easily installed downstream of a model, easily removed and low in cost by straightening air flow sucked from smoke suction ports detachably fitted downstream of the model disposed in an air duct, and evacuating smoke by an exhaust fan through a flow regulating valve. SOLUTION: When a blower 15 is driven, air flow delivered from the blower 15 passes a flow straightening net 30, reaches a blade model 5 together with smoke blown off from a smoke blow-off device 2 and visualizes air flow around. The smoke having passed the blade model 5 is sucked from a plurality of smoke suction ports 16 by the suction force of an exhaust fan 20 acting through a flow straightening part 17 and a flow regulating valve 19 and exhausted outside from a filter 21 provided at an exhaust port of a smoke exhaust duct 18. The suction quantity of smoke by the exhaust fan 20 is regulated by the flow regulating valve 19, and air is taken in from the outside by the sucked portion of air flow sucked from the smoke suction ports 16. The smoke is thus positively sucked and exhausted outside without causing the turbulence of air flow of a measuring part.
|
