| 摘要: |
| 本文针对自行设计的一种新型的具有三个箱体的多温区恒温箱进行其均温性的研究。以多温区恒温箱的一个箱体为研究对象，建立了三维稳态数值模型，模拟了加热器情况不同时该箱体内的温度分布。结果表明, 采用方形薄片加热器并布置于风机下方时，该箱体内的温度场最均匀。恒温箱三个箱体的加热器均采用上述情况后，对其设定了工况1（各箱体的设定温度分别为﹣15 ℃，﹣10 ℃，﹣5 ℃)和工况2（各箱体的设定温度分别为﹣20 ℃，﹣15 ℃，﹣10 ℃)进行实验。结果显示，工况1（即模拟工况）下的模拟值与实测值较吻合，最大误差为3.1%；两种工况下各箱体的温度均匀度最大为0.54 ℃。结果表明，在不同的测试工况下该多温区恒温箱各箱体内的温度分布都能维持均匀。 |
| 关键词: 多温区 恒温箱 温度场 温度均匀度 FLUENT模拟 |
| DOI： |
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| 基金项目: |
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| Numerical Simulation and Experimental Verification of Temperature Uniformity in a Novel Multi-temperature Thermostat |
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Zhao Xiuhong, Liu Baolin
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| (Institute of Biothermal Science, University of Shanghai for Science and Technology) |
| Abstract: |
| In this paper, the temperature uniformity of a self-designed novel multi-temperature thermostat with three chambers was studied. A steady-state three-dimensional numerical model based on one chamber ofthe thermostat was built to simulate its temperature distribution under different heater conditions. The results showed that the most uniform temperature distribution was obtained under the condition that the square-shaped heater was used and installed under the fan. Then with all chambers under such heater condition, the thermostat was tested under mode 1 (the temperatures for the chambers were set to ﹣15 ℃, ﹣10 ℃ and ﹣5 ℃, respectively) and mode 2 (the temperatures for the chambers were set to ﹣20 ℃, ﹣15 ℃ and ﹣10 ℃, respectively). The simulated values were in good agreement with the measured values with the maximum error of 3.1% under mode 1 (the simulated mode) , and the maximum temperature uniformity in the chambers was 0.54 ℃under the two tested modes. The obtained results showed that the temperature distribution within all chambers of this novel multi-temperature thermostat could keep uniform under different tested modes. |
| Key words: multi-temperature thermostat temperature field temperature uniformity FLUENT simulation |
