| 摘要 |
PURPOSE:To investigate the gas diffusion situation suitable to local natural conditions by fixing a terrain model in the air course of an air channel and discharging a gas at the constant position of the model while the air course is rotated based on an hourly distribution in a preset window direction. CONSTITUTION:A terrain table 4 on which the terrain model such as the model of a chimney is placed is installed in the center of the floor 3 of the air course 2 into which an air flow 1 generated by a fan 14 disposed between partitions 15 is blown. The side of the air course 2 is formed with reinforced glass. The floor 3 is supported circularly by supporting foundations 19 installed on a ground 18, and placed on an anti-friction roller 13. The frequency distribution of the direction in which a wind blows for one day at a local place is measured to create a window blowing figure, and the gas for tracer 17 is discharged from the model chimney 5 while the air course 2 including the fan 14 is rotated on the basis of the figure. Thus the diffusion due to the window blowing in all directions for one day can be simulated. Moreover a window speed can be added. |
