| 摘要 |
<p>A trapped-vortex pair flowmeter having a body with an inlet and an outlet. The inlet has a nozzle which forms a fluid jet having two primary counter-rotating vortices. The body has a chamber between the inlet and outlet through which the fluid jet flows. Two wedges are secured within the chamber. Each wedge has an inner side and an outer side. The inner sides of both wedges form a converging channel between the upper portions of both wedges. Both wedges have a gap between the inner sides of the wedges through which the converging channel passes. The inlet nozzle directs the fluid jet into the converging channel. A small portion of the fluid jet flows through the gap within the converging channel, but the majority of the fluid jet flows back over the top sections and down the outer sides of the wedges. Pressure sensors located within the chamber detect alternating high and low pressures at various points within the chamber. The fluid flow rate is proportional to the frequency of the oscillation of the two primary counter-rotating vortices within the main fluid jet stream.</p> |
