| 摘要 |
PURPOSE:To measure the concentration distribution of gas in a diffusion area quantitatively by placing tapes on the surface of a relief model supported rotatably in a measurement wind tunnel wherein a wind diffused by a rotatable plate type air current controller flows at a desired speed, and allowing a discoloration reagent with which the tapes are impregnated to react with tracer gas. CONSTITUTION:A fan 5 is rotated and the air current controller 6 is put in operation. The air current controller 6 is a rotatable plate type arranged perpendicularly, and this is operated to regenerate the wind which flows at the desired speed on specific air current condition (degree of disorder), thereby diffusing mixed gas discharged from a chimney model 2. Relief models 3 and 4 are supported rotatably at the downstream side and adjusted to set a specific wind direction. The diffused gas discharged from the chimney model 2 contacts the tape 12 on the surface of the relief model 4 of discolor the discoloration reagent with which the tape 12 is impregnated, so the diffusion range of the gas is known from the discoloration state. |
