Special-shaped fin structure design method for strengthening natural convection heat exchange

Abstract

A special-shaped fin structure design method for strengthening natural convection heat exchange comprises the steps that firstly, a physical model of a natural convection heat exchange problem is determined, according to the actual fin structure design problem based on natural convection heat exchange, a domain to be analyzed and geometric and physical conditions are extracted, and the physical model suitable for topological optimization is established; a finite body analysis model of the base structure is established; an optimization model of the special-shaped fin structure is established; an optimization model driven by a physical field is established by adopting a topological optimization method described by a variable density method to minimize a uniform temperature target function ata heat source, and the optimization direction of each time is determined; then iterative optimization of the special-shaped fin structure is carried out, and the optimized special-shaped fin structure is obtained; and finally, the optimized special-shaped fin is subjected to smoothing and rounding treatment. According to the method, the design experience is not needed, the complex design, simulation and improvement redesign process is not needed, the obtained special-shaped fin structure can fully strengthen the natural convection heat exchange effect, and the optimal cooling effect is achieved.

Description

technical field [0001] The invention belongs to the technical field of fin structure design, and in particular relates to a special-shaped fin structure design method for enhancing natural convection heat transfer. Background technique [0002] The miniaturization, high power and low noise of electronic equipment make it have higher requirements for heat dissipation. Cooling equipment based on the natural convection heat transfer effect is widely used because it can provide better heat dissipation effect without external power, no additional facilities, and no noise; among them, the fin structure decisively affects the heat dissipation effect . The fin structure conducts heat through contact with the heat source; the fluid around the fins can quickly take away a large amount of heat conducted by the fins through the interaction with the fins and the natural convection effect, thereby achieving a cooling effect; and the natural convection The quality of the fin structure ca...

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Problems solved by technology

[0003] With the development of computer simulation technology, the method of combining the design of fin structure with enhanced natural convection heat transfer and heat-flow coupling simulation has become the mainstream; the designer designs the fin structure based on experience and intuition, and then uses heat-flow coupling simulation software Carry out simulation analysis to obtain fluid convection and cooling effect, verify whether it meets the requirements of use, and provide improvement measures for fin structure; this design method combined with heat flow simulation is compared with the previous design method of heat flow coupling experiment, although A lot of cost and time are saved, and the design can be optimized relatively easily, but both of them still need to repeat the design, simulation, and improvement work in the design process, and the energy is mainly concentrated on the size optimization of the natural convection fin structure Above; the fin structure finally adopted, its layout configuration is usually rectangular, cylindrical, etc. in an array. Although the form is simple and easy to process and manufacture, it lacks the necessary theoretical basis and is not necessarily consistent with the actual convective heat transfer. Matching, it is difficult to ensure that the fin structure can maximize the enhanced natural convection cooling effect

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