초록 ▼

A fluid dispersal device utilizes the Karman Vortex street phenomenon to cyclically oscillate a fluid stream before issuing the stream in a desired flow pattern. A chamber includes an inlet and outlet with an obstacle or island disposed therebetween to establish the vortex street. The vortex street

A fluid dispersal device utilizes the Karman Vortex street phenomenon to cyclically oscillate a fluid stream before issuing the stream in a desired flow pattern. A chamber includes an inlet and outlet with an obstacle or island disposed therebetween to establish the vortex street. The vortex street causes the stream to be cyclically swept transversely of its flow direction in a manner largely determined by the size and shape of the obstacle relative to the inlet and outlet, the spacing between the obstacle and the outlet, the outlet area, and the Reynolds number of the stream. Depending on these factors, the flow pattern of the stream issued from the outlet may be either: a swept jet, residing wholly in the plane of the device and which breaks up into droplets solely as a result of the cyclic sweeping, the resulting spray pattern forming a line when impinging on a target; or a swept sheet, the sheet being normal to the plane of the device and being swept in the plane of the device, the resulting pattern containing smaller droplets than the swept jet pattern and covering a two-dimensional area when impinging upon a target.

대표청구항 ▼

A fluid oscillator device, comprising: a body member having a chamber therein, said chamber having a fluid inlet for receiving fluid under pressure and admitting it into said chamber and a fluid outlet for issuing pressurized fluid from said chamber into an ambient environment, said inlet and outlet

A fluid oscillator device, comprising: a body member having a chamber therein, said chamber having a fluid inlet for receiving fluid under pressure and admitting it into said chamber and a fluid outlet for issuing pressurized fluid from said chamber into an ambient environment, said inlet and outlet defining a flow path therebetween for flow of fluid through said chamber; and oscillation-inducing means for causing the fluid issued from said outlet to cyclically sweep back and forth, said oscillation-inducing means comprising surface means disposed in said flow path and responsive to fluid from said inlet impinging thereon for establishing alternating vortices in said fluid at side-by-side locations downstream of said surface means.