KARMAN VORTEX FLOW METER

PURPOSE:To take a stable measurement even in the transient state of a flow velocity by forming a downstream columnar body so that its section is shaped almost in a slit circular curved surface and also rounding the edge of the isoceles triangular bottom part of the section of an upstream columnar body. CONSTITUTION:A columnar body 7 put in a flow of fluid at right angles consists of the upstream columnar body 5 and downstream columnar body 8. The upstream columnar body 5 is sectioned almost in an isoceles triangular shape and the downstream columnar body 8 is sectioned almost in the slit circular curved surface shape. The, the columnar bodies 5 and 8 are so arranged that their base parts 9 and 10 which have almost equal length (d) are held parallel at a specific interval (a) in the direction of the flow and cross the flow at the right angles. Further, the vertical angle alpha of the columnar body 5 is almost 90 deg. and the edge of the base part is rounded; and the height (h) of the columnar body 8 is 0.3-0.6d and the radius (r) is