竜巻型遠隔吸引装置で生成される竜巻状旋回流の特性

抄録

We developed a tornado-type remote suction device. That is, a generation method of tornado-like swirling flow using a rotating disk was proposed. Visualization experiments with dry ice mist are conducted to investigate the characteristics of tornado-like swirling flow. The experimental parameters controlled in this study are configuration of the rotating disk, installation height, and suction flow rate. Swirling flow with fins attached on the rotating disk is stronger than that without fins. Various shapes of fin are tested to intensify the swirling flow. The simplest fin shape like a straight board aligned with radial direction is sufficient to enforce the swirling flow. Installation height is limited for the generation of tornado-like swirling flow under a certain operation condition. The diameter of the rotating disk is very important parameter for generating swirling flow. Proper balance of suction flow rate and swirling flow is required to generate stable tornado-like swirling flow.