Vortex generator

Abstract

The invention relates to a vortex generator. The vortex generator comprises a bottom piece, a cooling liquid opening hole and a plurality of vertically-arranged trapezoid pieces, the bottom piece is asquare plate, the cooling liquid opening hole is formed in the center of the bottom piece, each trapezoid piece is a right trapezoid plate, the right-angle edge of each trapezoid piece is fixedly connected with the upper surface of the bottom piece, the plurality of trapezoid pieces are symmetrically arranged on the two sides of the cooling liquid opening hole, and the plurality of trapezoid pieces on each side of the cooling liquid opening hole are arranged in a straight line. The vortex generator has the beneficial effects that the generator can enable the gas flowing through the fins to generate vortex movement and can promote mixing of cold and hot gas located the surfaces of the fins and above the fins, the gas side heat resistance is reduced, and the heat exchange efficiency is improved; and due to the design of the perpendicular arrangement mode of the trapezoid pieces and the bottom piece, it is ensured that the pressure loss can be relatively small when the gas flows throughthe radiator, the trapezoid piece machining process is simple, and batch production is facilitated.

Description

technical field [0001] The invention relates to a vortex generator for the cooling of flowing gas, which generator is located on the radiator fins. In particular, it relates to a vortex generator mounted on the fin surface of a forced cooling heat exchanger. Background technique [0002] The enhanced heat transfer technology of vortex generator is a kind of enhanced heat transfer technology that the industry pays more attention to at present. The vortex generator is usually loaded on the fins of the heat exchanger by stamping, bending or welding. Under the action of the fan, a stable horseshoe-shaped longitudinal vortex can be generated in the flow channel of the heat exchanger. There are generally two types of vortex generators, airfoil and body. Most of the finned tube heat exchangers commonly used in the industry are airfoil vortex generators. The assembly method generally has two types: wing type and winglet type. The tail edge of the former is connected to the fins; ...

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Problems solved by technology

[0003] After searching the prior art, it was found that Mohammad Samad et al. designed in the article "Numerical simulation of heat transferenhancement in a plate-fin heat exchanger using a new type of vortexgenerator" published in Applied Thermal Engineering, 2018, 133:671-681 Several vortex generators with different structures have been developed, but there are still problems such as uneven distribution of the longitudinal vortex field and large pressure loss.

[0004] In the article "Optimal design of the semi-dimple vortex generator in the fin and tube heat exchanger" published by Nares Chimres et al. in International Journal of Heat and Mass Transfer, 2018, 120 (1173-1186), hemispherical vortex generation was proposed Although the design of this structure, the pressure loss at the inlet and outlet of the heat exchanger does not change much, but the heat exchange efficiency of the radiator does not improve significantly

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