Exhaust treatment system for work vehicles and related flow mixers

An exhaust treatment system for a work vehicle, the system comprising:

• a selective catalytic reduction (SCR) system configured to react a mixture of exhaust reductant and engine exhaust with a catalyst to generate a treated exhaust flow, the SCR system including an SCR outlet for expelling the treated exhaust flow therefrom;
• a flow conduit in fluid communication with the SCR outlet for receiving the treated exhaust flow expelled from the SCR system;
• an exhaust sensor positioned within the flow conduit downstream of the SCR outlet, the exhaust sensor being configured to detect an amount of an emission gas present in the treated exhaust flow;
• and
• a flow mixer positioned upstream of the exhaust sensor, the flow mixer extending between an upstream end and a downstream end along an axial direction, the flow mixer comprising:
• a sidewall extending between the upstream and downstream ends, the sidewall defining a plurality of sidewall openings, each of the plurality of sidewall openings extending in the axial direction across a first axial range;
• an end wall coupled to the sidewall proximate the upstream end, the end wall defining sector openings;
• and
• a plurality of swirler vanes, each of the plurality of swirler vanes extending in a circumferential direction of the flow mixer from adjacent a respective one of the sector openings and in the axial direction across a second axial range, the first axial range at least partially overlapping the second axial range,
• wherein the plurality of swirler vanes is configured to impart a spiraling flow trajectory to the treated exhaust flow flowing from the SCR to the exhaust sensor.

A flow mixer for use within an exhaust treatment system of a work vehicle, the flow mixer comprising:

• a sidewall extending between an upstream end and a downstream end along an axial direction, the sidewall defining a plurality of sidewall openings, each of the plurality of sidewall openings extending in the axial direction across a first axial range;
• an end wall coupled to the sidewall proximate the upstream end, the end wall defining sector openings extending in a radial direction of the flow mixer across a first radial distance;
• and
• a plurality of swirler vanes, each of the plurality of swirler vanes extending in a circumferential direction of the flow mixer from a respective one of the sector openings and in the radial direction across a second radial distance and in the axial direction across a second axial range,
• wherein the second radial distance is less than the first radial distance, and
• wherein the first axial range at least partially overlaps the second axial range.