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Reinforced heat transfer element of truncated cylindrical surface wing type 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 high consumables and manufacturing costs, and difficult processing, and achieve reduced shape resistance and high strength. Large, enhanced effect of convective heat transfer

Inactive Publication Date: 2009-09-16
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Abstract
  • Description
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  • 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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  • Reinforced heat transfer element of truncated cylindrical surface wing type vortex generator
  • Reinforced heat transfer element of truncated cylindrical surface wing type vortex generator

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Embodiment Construction

[0012] 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 a reinforced heat transfer element of a truncated cylindrical surface wing type vortex generator, belonging to the field of heat transfer parts of heat exchanger. The vertical surface of a wing type vortex generator is bent into a semi cylindrical surface or a semi elliptic cylindrical surface to be arranged on a fin tube or a fin tube of a plate-fin heat exchanger or other passage flow heat exchanger plate surface in a certain incident flow impact angle and a certain array manner so as to induce the end longitudinal vortex and the root part horse shoe vortexes to couple to be thinned or destruct the boundary layer clinging to the wall face or reinforce the turbulence intensity to realize the passive reinforced heat exchange and improve the efficiency of the heat exchanger. In addition, due to the streamline surface, the shape resistance is reduced, thus lowering the flowing pressure loss and the fluid transportation energy consumption. The vortex generator can be manufactured by metal or other bendable molding materials, has the characteristics of simple manufacturing and convenient installation, and has extensive application prospect and promotion 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 Applications(China)
IPC IPC(8): F28F13/02F28F13/12F28F21/00
Inventor 周国兵
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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