PROBLEM TO BE SOLVED: To generate a stable vortex ring having a long range by a vortex ring generation device (10) including an extrusion mechanism (16) for extruding a gas so that a gas in a gas passage (13) of a casing (11) is discharged from a discharge port (14) in a vortex ring shape.SOLUTION: A vortex ring generation device is configured so as to meet relations of 0.045≤D≤0.135, 0.15≤L≤0.35 and 3≤U≤5, where V (m3) represents an extrusion volume, D (m) represents a diameter of a discharge port (14), L (m) represents a length of a cylinder of which diameter is D and volume is V, and U (m/s) represents a blowout flow speed.SELECTED DRAWING: Figure 4COPYRIGHT: (C)2020,JPO&INPIT【課題】ケーシング（11）の気体通路（13）の気体が放出口（14）から渦輪状となって放出されるように気体を押し出す押出機構（16）を備えた渦輪生成装置（10）において、到達距離が長くて安定した渦輪を生成する。【解決手段】押出体積をＶ（ｍ３），放出口（14）の直径をＤ（ｍ），直径がＤで体積がＶの円柱の長さをＬ（ｍ），吹出流速をＵ（m/s）とすると、０．０４５≦Ｄ≦０．１３５，０．１５≦Ｌ≦０．３５，及び３≦Ｕ≦５の関係を満たすように構成する。【選択図】図４
