Self-contained tubular compressed-flow generation device for use in making differential measurements

A compressed-flow generation device for use in making differential measurements of attributes of a fluid moving in a flow direction through a conduit, comprising:

• an open-ended tubular flow obstruction having an outer annular wall and an inner annular wall, wherein a longitudinal profile of said outer annular wall is curvilinear in the flow direction with a portion of said outer annular wall defining a maximum radius of said flow obstruction, and wherein a longitudinal profile of said inner annular wall is curvilinear in the flow direction with a portion of said inner annular wall defining a minimum radius of said flow obstruction;
• an arcuately-shaped support arm having a first end and a second end, said first end adapted to be coupled to an exterior wall of a conduit, said second end coupled to said flow obstruction, wherein said support arm is adapted to position said flow obstruction centrally in the conduit wherein a first flow region is defined around said outer annular wall and a second flow region is defined by said inner annular wall, and wherein said first end and said second end are separated from one another along the flow direction with said first end being upstream of said second end;
• at least one measurement port formed in said support arm;
• a first manifold formed in said support arm and in fluid communication with each said measurement port so-formed in said support arm, said first manifold terminating and accessible at the exterior wall of the conduit;
• at least one measurement port formed in said flow obstruction, each said measurement port so-formed in said flow obstruction in fluid communication with one of said first flow region and said second flow region;
• and
• at least one second manifold formed in said flow obstruction and said support arm, each said second manifold in fluid communication with each said measurement port so-communicating with one of said first flow region and said second flow region, each said second manifold terminating and accessible at the exterior wall of the conduit.

A compressed-flow generation device for use in making differential measurements of attributes of a fluid moving in a flow direction through a conduit, comprising an integrated device adapted to be inserted through an aperture formed in an exterior wall of a conduit, adapted to be suspended from and sealed to the exterior wall at the aperture, and adapted to reside in the conduit, said integrated device including

• an open-ended tubular flow obstruction adapted to pass through the aperture, said flow obstruction having an outer annular wall and an inner annular wall, wherein a longitudinal profile of said outer annular wall is curvilinear in the flow direction with a portion of said outer annular wall defining a maximum radius of said flow obstruction, and wherein a longitudinal profile of said inner annular wall is curvilinear in the flow direction with a portion of said inner annular wall defining a minimum radius of said flow obstruction,
• an arcuately-shaped support arm adapted to pass through the aperture, said support arm having a first end and a second end, said first end adapted to be coupled to an exterior wall of a conduit, said second end coupled to said flow obstruction, wherein said support arm is adapted to position said flow obstruction centrally in the conduit wherein a first flow region is defined around said outer annular wall and a second flow region is defined by said inner annular wall, and wherein said first end and said second end are separated from one another along the flow direction with said first end being upstream of said second end,
• at least one measurement port formed in said support arm,
• a first manifold formed in said support arm and in fluid communication with each said measurement port so-formed in said support arm, said first manifold terminating and accessible at the exterior wall of the conduit,
• at least one measurement port formed in said flow obstruction, each said measurement port so-formed in said flow obstruction in fluid communication with one of said first flow region and said second flow region, and
• at least one second manifold formed in said flow obstruction and said support arm, each said second manifold in fluid communication with each said measurement port so-communicating with one of said first flow region and said second flow region, each said second manifold terminating and accessible at the exterior wall of the conduit.