Crystallizer instantaneous heat flow distribution construction method and calculation method
A technology of heat flow distribution and construction method, which is applied in the directions of calculation, computer-aided design, design optimization/simulation, etc. It can solve the problems of inconsistent measured results and inability to guarantee the reliability of model calculation, and achieve the effect of ensuring reliability.
Active Publication Date: 2020-07-31
CONTINUOUS CASTING TECH ENG OF CHINA
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Based on this, the object of the present invention is to provide a crystallizer instantaneous heat flow distribution construction method and calculation method to solve the problem that the instantaneous heat flow obtained in the prior art does not match the measured results, and the reliability of the model calculation cannot be guaranteed.
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[0071] A factory has a 155×155mm billet, and the effective height of the crystallizer is 900mm. The average heat flow at different casting speeds is shown in Table 1 by collecting the crystallizer water volume and temperature difference in actual production. In the calculation model, the crystallizer is discretized into 65 grids along the height direction, that is, N=65. The calculated grid spacing is 0.014m, and n is set to -0.5. The specific value of A obtained is shown in Table 1:
[0072] Table 1 Calculation parameters
[0073] Pulling speed (m / min) Average heat flow (MW / m^2) A coefficient 4 2.7 2.122 5 3.0 1.935
[0074] Table 2 shows the derivation process and final results of the instantaneous heat flow distribution. It can be seen from Table 2 that the average heat flow obtained by averaging the instantaneous heat flow distribution can be completely equal to the measured average heat flow, which guarantees the crystallizer in the model cal...
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The invention discloses a crystallizer instantaneous heat flow distribution construction method. The crystallizer instantaneous heat flow distribution construction method comprises the following stepsof: acquiring an average heat flow at a set pulling rate; and constructing instantaneous heat flow distribution according to a limiting condition, wherein the limiting condition is that an average value of instantaneous heat flow distributions in different height directions of a crystallizer is equal to an average heat flow. The invention further discloses a crystallizer instantaneous heat flow calculation method. By adopting the crystallizer instantaneous heat flow distribution construction method and the crystallizer instantaneous heat flow calculation method, the total heat exported from the crystallizer can be ensured to accord with the actual situation, and the reliability of the model calculation result is ensured.
Description
technical field [0001] The invention relates to the technical field of continuous casting slab temperature field calculation, in particular to a method for constructing and calculating instantaneous heat flow distribution of a crystallizer. Background technique [0002] In the continuous casting slab temperature field calculation model, the reliability of the heat transfer calculation in the mold is the premise of the slab temperature field calculation, which will affect the temperature distribution of the subsequent temperature field calculation and the solidification end result, thus affecting the dynamic water distribution Process and reduction process formulation, etc. The factors affecting the heat transfer treatment in the crystallizer in the temperature field calculation model can be summarized as the following two aspects: [0003] On the one hand is the average heat flow. The average heat flow evaluates how quickly and how much heat is exported from the crystalliz...
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Login to View More IPC IPC(8): G06F30/20G06F119/08
Inventor 钱亮韩占光谢长川李富帅周干水郭春光谭杜
Owner CONTINUOUS CASTING TECH ENG OF CHINA