System wind resistance characteristic simulation method

A technology of wind resistance characteristics and simulation methods, applied in computer-aided design, design optimization/simulation, calculation, etc., can solve problems such as increasing fan selection, system thermal simulation workload, difficulty in finding suitable fans, and increasing time costs. Achieve the effect of shortening the product development cycle, improving the one-time pass rate, and reducing the R&D cost

Pending Publication Date: 2020-02-21
GUOCHUANG INNOVATION CENTER OF MOBILE ENERGY (JIANGSU) CO.,LTD.
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  • Description
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  • Application Information

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Problems solved by technology

This kind of fan selection method under the condition of unclear system resistance is difficult to succeed at the first time, so it is necessary to carry out multi-wheel fan selection and CFD simulation to det

Method used

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Experimental program
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Effect test

Embodiment 1

[0043] In the CFD simulation of the in-band fan electronic equipment system with a single system fan, when the air inlet and outlet are determined, the effective ventilation area of ​​the fan is estimated; based on the 3D structural model of the electronic equipment, the relevant filter cotton, module wind resistance data and the PQ of the internal fan For parameters such as curves, modeling and parameter setting are carried out in the CFD simulation software. Among them, the system fan can be given with reference to the parameters of similar fan diameters or can be estimated; the above-mentioned model is meshed, and if the system is more complicated, it can be divided into blocks Use the method to refine the grid locally, adjust the grid according to the convergence situation, try the calculation until the residual curve converges, and continue to refine the grid until it has no effect on the simulation results; the maximum flow rate and maximum static pressure in the system fa...

Embodiment 2

[0045] In the CFD simulation of the in-band fan electronic equipment system with multi-system fan parallel connection, in the case of determining the air inlet and outlet, the effective ventilation area of ​​the fan and the number of installed system fans are estimated; from the 3D structural model of the electronic equipment, related filter cotton, modules Parameters such as wind resistance data and PQ curve of the internal fan are modeled and parameterized in the CFD simulation software. The parameters of the system fan can be given with reference to the parameters of similar fan diameters or can be estimated; the above models are meshed , if the system is relatively complex, the grid can be locally refined by the block method, and the grid can be adjusted according to the convergence situation, and the trial operation can be performed until the residual curve converges, and the grid can be further refined until it has no effect on the simulation results; One of the maximum f...

Embodiment 3

[0047]In the CFD simulation of the in-band fan electronic equipment system with multi-system fans connected in series, when the air inlet and outlet are determined, the effective ventilation area of ​​the fan and the number of fans installed in the system are estimated; the 3D structural model of the electronic equipment, the relevant filter cotton, and the wind resistance of the module Data and parameters such as the PQ curve of the internal fan are modeled and parameterized in the CFD simulation software. In addition, the outermost fan is regarded as the system fan, and the other fans are regarded as the internal fan. The internal fan required by the specified system that falls in the best working area, the selected system fan parameters can be given with reference to the parameters of similar fan diameters or can be estimated; the above model is meshed, and if the system is more complex, it can be divided into blocks Carry out local refinement of the grid, and adjust the gri...

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Abstract

The invention provides a system wind resistance characteristic simulation method. The method comprises the steps of obtaining the required air volume of electronic equipment with in-band draught fans,and estimating the number of the system draught fans needing to be installed; obtaining a system thermal analysis model, inputting the estimated number of system fans into the system thermal analysismodel, and setting other analysis parameters of the system thermal analysis model; wherein the analysis parameters at least comprise an internal fan performance parameter, a wind resistance parameterof a wind resistance device and a system fan performance parameter; setting one of the maximum flow and the maximum static pressure in the system fan performance parameters as a constant value, and performing parameterization setting on the other parameter; determining a series of system fan working points based on parametric analysis and calculation of the set system thermal analysis model, anddrawing a system wind resistance characteristic curve; effective heat management on the product is facilitated, the product development period can be shortened, the research and development cost is reduced, and the one-time passing rate of prototype heat dissipation is greatly increased.

Description

technical field [0001] The invention belongs to the technical field of electronic equipment systems, and in particular relates to a system wind resistance characteristic simulation method. Background technique [0002] In the thermal design of electronic products, especially the optimization design process, it is necessary to optimize the waterproof structure of the air inlet and outlet or the wind resistance of a certain part. At present, the commonly used simulation method is the simulated wind tunnel method, that is, different wind speed boundary conditions are sequentially set at one end of the simulated wind tunnel, and the wind resistance values ​​under each wind speed condition are obtained statistically. [0003] For electronic equipment without internal fans, CFD simulation can currently use the method of setting speed / flow, pressure and other related parameters at the air inlet or outlet to simulate the system wind resistance value of the cabinet system at differen...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06F119/08
Inventor 陈卫红钱广义汪建峰郑隽一张育铭李德胜曾晓东
Owner GUOCHUANG INNOVATION CENTER OF MOBILE ENERGY (JIANGSU) CO.,LTD.
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