Patent ID: 8479878
Filing Date: 2013-07-09
Classification: F01N,F16L,F41A,Y10T

Abstract:
1. A tube for moving gas between an entry end into which gas is introduced and an exit end through which gas exits the tube, the tube comprising: a plurality of adjoining adjacent guides, each guide comprising an outer portion of a smoothly-curved, modified torus whose inner wall has concave curvature on the gas inlet end and convex curvature on the gas outlet end and has an inflection point of curvature axially downstream of the inlet of the respective guide; and an outer rigid tube wall; wherein each guide forms smoothly curved internal cavity with a cavity mouth opening into an inner portion of the tube, the cavities shaped such that a vortex forms within each of the cavities as gas passes through the tube; and wherein flow of fluid in the tube is unidirectional and axial from the entry end to the exit end.