Unbalanced-flow, fluid-mixing plug with metering capabilities

A fluid mixer, comprising:

• a flow-interrupting plug having a plurality of holes formed therethrough wherein a remaining portion is closed to fluid flow therethrough, said plug adapted to be fitted in a conduit supporting a fluid flow, said plug extending across a transverse portion of the conduit and sequentially defining, in terms of a direction of said fluid flow, (i) an inlet face, (ii) a plug body, and (iii) an outlet face,
• said inlet face defining a central circular region and a ring-shaped region surrounding said central circular region,
• said ring-shaped region including at least some of said remaining portion so-closed to fluid flow, said remaining portion at each radius R of ring shaped region satisfying a radius independent, flow-based relationship
• AR=a/(XRVRb)
• where AR is a sum of areas of said remaining portion centered at said radius R,
• XR is a flow coefficient at said radius R that is equal to (ρK)R where ρR is a density of a fluid that could flow through the conduit at said radius R and KR is a flow correction factor associated with the fluid that could flow through the conduit at said radius R,
• VR is a velocity of the fluid that could flow through the conduit at said radius R,
• b is a constant selected to make at least one process variable, associated with the fluid that is to flow through the conduit, approximately equal at each said radius R, and
• a is a constant that is equal to (XRARVRb) at each said radius R;
• and
• a plurality of entry openings defined in said inlet face in correspondence with said plurality of holes, said entry openings defining an open flow area at each said radius R of said ring-shaped region defined as A′R, wherein
• A′R=APipe−AR,
• where APipe is the cross-sectional area of the conduit at said plug,
• wherein, for each of said entry openings at each said radius R where R<M, said open flow area at radius R is greater than that at a radius RSmaller where RSmaller<R, and
• wherein, for each of said entry openings at each said radius R where R>M, said open flow area at radius R is less than that at a radius RLarger where RLarger>R, and
• where M is a radius in the range of approximately (0.4)RPipe to (0.97)RPipe where RPipe is the radius of the conduit.