| 摘要 |
PURPOSE:To generate an artificial tornado simply and easily and permit the utilization thereof for the purpose of a wide range by a method wherein a whirling airstream, continuous to the lengthwise direction of an air blow-off pipe, is formed in a space in an air curtain by the wake effect of the air curtain and, further, another airstream from the center thereof toward a suction hole is formed. CONSTITUTION:When air is sent into respective air blow-off pipes 2, the air is discharged out of respective air blow-off ports 3 successively so that the air is whirled with a constant speed and same rotating direction with respect to the direction of respective air blow-off pipes 2, whereby transversal air curtains 8, shown by arrow signs in the diagram are formed. A whirling airstream, continuous to the lengthwise direction of the air blow-off pipe, is generated in a space between respective air blow- off pipes 2 and, further, the part B of core is formed in the eddy current of the whirling airstream by the suction of an air suction port 6. A negative pressure zone is formed uniformly along the center of the eddy current by the suction from one or both sides of the center of the continuous eddy current whereby the core part B is generated and an artificial tornedo 9 may be generated.
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