Low-resistance square diverging reducing component

Abstract

The invention discloses a low-resistance square diverging reducing component which comprises an inlet tube (5), an outlet tube (6) and a diverging section connected with the two nozzles. The low-resistance square diverging reducing component is characterized in that a reducing section connecting an arc diverging section (1) and an isodiametric section (2) is arranged on the diverging section, and an arc transition section (3) is arranged at the joint of the tail of the isodiametric section (2) and the inlet tube (5) to form a square diverging reducing passage. By the unique design, the diverging reducing outer margin is respectively attached to the outer margins of an injection section, a core section 1 and a core section 2 generated when fluid flows by a sudden expansion section so as to eliminate a vortex area generated when the fluid flows by a diverging reducing section and finally achieve the aim of reducing the resistance of the fluid flowing by an elbow.

Description

technical field [0001] The invention relates to a partial component of ventilation and air conditioning, in particular to a low-resistance square gradually expanding variable-diameter component. Background technique [0002] The flow of fluid in the straight pipe section is divided into two kinds of flow states: laminar flow and steady flow. For laminar flow, the velocity distribution across the pipe section is a paraboloid of revolution with the centerline of the pipe as the axis. For turbulent flow, the velocity distribution is different from laminar flow. The flow velocity distribution on the cross-flow section can be roughly divided into three regions. There is a thin layer of fluid near the wall, and there is a large velocity gradient along the radial direction. This layer is called The viscous substratum, or the near-wall laminar layer. Due to the exchange of turbulent pulsating momentum, the flow velocity distribution is relatively uniform in most areas not far from...

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Problems solved by technology

Moreover, because it is not the same as the flow law of the fluid in the variable diameter member and the fluid movement law guided by the gradual expansion, that is, the variable diameter design is not carried out according to the law of the development of the core area, which is the common variable diameter. Large vortices will be generated at the variable diameter member and the inlet and outlet of the pipe, resulting in greater flow resistance

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