Enhanced heat transfer element of oblique truncated cylindrical wing vortex generator

A vortex generator and enhanced heat transfer technology, which is applied in the field of enhanced heat transfer elements of oblique truncated cylindrical wing vortex generators, can solve the problems of difficult processing, high consumables and manufacturing costs, etc., and achieve high strength and low shape resistance. Small, easy to produce effects

Inactive Publication Date: 2011-12-28
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the difficulty of processing, the cost of consumables and manufacturing is relatively high

Method used

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  • Enhanced heat transfer element of oblique truncated cylindrical wing vortex generator
  • Enhanced heat transfer element of oblique truncated cylindrical wing vortex generator
  • Enhanced heat transfer element of oblique truncated cylindrical wing vortex generator

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Embodiment Construction

[0011] The invention provides an enhanced heat transfer element for a slanted truncated cylindrical wing type vortex generator with good effect of enhanced heat exchange, small flow resistance loss, simple processing and manufacturing, and convenient installation. The enhanced heat transfer element of the oblique truncated cylindrical wing type vortex generator is a trapezoidal wing or a delta wing (such as figure 1 (a) shown), and then bend its facade into a semi-cylindrical or semi-elliptic cylinder form with a / b curvature; or first bend the rectangular wing facade with a / b curvature into a semi-cylindrical or The form of elliptical cylinder, and then beveled from the top of one vertical side to the other vertical side according to the angle α (such as figure 1 (b), figure 1 (c) shown). The length, height, and thickness dimensions or proportions of the rectangular wings are determined by the heat exchanger form and the corresponding design requirements of the flow channel ...

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Abstract

The invention discloses an intensified heat transfer element for a vortex generator with oblique truncated cylindrical fins, which belongs to the field of heat transfer components of heat exchangers. It is to bend the facade of the airfoil vortex generator into a semi-cylindrical or semi-elliptical cylindrical form, and arrange it on the finned tube or the fin of the plate-fin heat exchanger or other channel flow heat exchange at a certain angle of attack and array. On the surface of the plate, the longitudinal vortex at the end is induced and the horseshoe vortex at the root is coupled to thin or destroy the boundary layer close to the wall or increase the turbulence intensity to achieve passive enhanced heat transfer and improve the efficiency of the heat exchanger. In addition, it is important that due to its streamlined surface, the shape resistance is reduced, thereby reducing the flow pressure loss and reducing the energy consumption of fluid transportation. This kind of vortex generator can be processed by metal or other flexible forming materials, has the characteristics of simple manufacture and convenient installation, and has broad application prospects and popularization value in gas-liquid or gas-gas heat exchangers.

Description

technical field [0001] The invention belongs to the field of heat transfer components of heat exchangers, in particular to an enhanced heat transfer element for a vortex generator with obliquely truncated cylindrical wings. Specifically, the facade of the airfoil (delta wing, rectangular wing, trapezoidal wing) vortex generator is bent into a semi-cylindrical or semi-elliptical cylindrical surface, and it is arranged on the finned tube or plate-fin at a certain angle of attack and in an array. The fins of the heat exchanger or other channels flow on the heat exchanger plate, thereby inducing the coupling of the longitudinal vortex at the end and the horseshoe vortex at the root to thin or destroy the boundary layer close to the wall or increase the turbulence intensity to achieve passive enhanced heat transfer. heat and improve the efficiency of the heat exchanger. Background technique [0002] Gas-liquid or gas-gas (steam) heat exchange equipment is widely used in power pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28F13/02F28F13/12F28F21/00
Inventor 周国兵
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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