N-type 180-degree rectification bent pipe

Abstract

The invention discloses an n-type 180-degree rectification bent pipe comprising an inlet section, an n-type 180-degree turning section and an outlet section, wherein one end of the inlet section is connected with the n-type 180-degree turning section, and the other end of the n-type 180-degree turning section is connected with a buffer section; a rectification section connected with the outlet section is arranged below the buffer section; an upper end in the rectification section is provided with rectification vanes; and each rectification vane is provided with a fluid vane which divides the rectification section into five fluid paths with equal flow. The peculiar design of the n-type 180-degree rectification bent pipe eliminates speed stratification formed after fluid flows through the n-type 180-degree rectangular bent pipe so as to realize the purpose of rectifying the fluid which flows through the n-type 180-degree rectangular bent pipe.

Description

technical field [0001] The invention relates to a partial component in a ventilation and air-conditioning system, in particular to a Π-shaped 180° rectifying elbow with a rectangular section. Background technique [0002] Rectangular cross-section Π-type 180° elbow is an extremely common connecting pipe fitting for changing the flow direction of fluid in HVAC power fluid machinery. In Π-type 180° elbow, because the fluid undergoes two turns inside, it can achieve a 180° change of direction. The velocity distribution of the first change of direction in the elbow is the same as that of a single 90° elbow: in the first change of direction, the center of fluid turbulence shifts to the inside of the bend, and the velocity is reached at the inner side of the bend near the wall. Maximum value; within the distance from the first elbow to the front of the second elbow, the center of turbulent flow is near the wall on the outside of the elbow; the flow velocity distribution in the sec...

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