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| 水平直管内乙醇浆体流动压降数值模拟和实验研究 |
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范肖雅1, 周黎旸2, 陈琪3, 王树华2, 王斌辉2, 高如启3, 陈光明3, 唐黎明3, 金滔3
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| (1.浙江大学工程师学院;2.巨化集团有限公司;3.浙江大学能源工程学院) |
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| 摘要: |
| 乙醇浆体因其在标准大气压下温度与常温（25 ℃）温差较大、显热蓄冷量大等特征，可作为冷链运输市场的蓄冷介质。在应用中乙醇浆体的流动特性（尤其压降）是很重要的特征参数。本文结合Gidaspow提出的以颗粒相动力学为基础的双流体模型，利用FLUENT研究了水平直管内乙醇浆体流动压降随含固率和流速的变化规律。当流速从0.51 m/s增至0.92 m/s时，含固率从10.4%升至30.5%时，压降从5.184 kPa/m增至63.707 kPa/m，模型与实验测量变化规律一致，实验结果与数值模拟结果平均偏差为12.8%。 |
| 关键词: 蓄冷介质 乙醇 压降特性 固液两相 |
| DOI： |
| Received:August 31, 2022Revised:November 15, 2022 |
| 基金项目: |
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| Numerical Simulation and Experimental Study of Pressure Drop of Ethanol Slurry Flow in Horizontal Straight Pipe |
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Fan Xiaoya1, Zhou Liyang2, Chen Qi3, Wang Shuhua2, Wang Binhui2, Gao Ruqi3, Chen Guangming3, Tang Liming3, Jin Tao3
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| (1.Polytechnic Institute, Zhejiang University;2.JUHUA Group Corporation;3.College of Energy Engineering, Zhejiang University) |
| Abstract: |
| Due to the large temperature difference between ambient temperature (25 ℃) and the temperature under standard atmospheric pressure and its large sensible heat storage capacity, ethanol slurry can be used as a cold thermal energy storage medium in the cold-chain transportation market. The flow characteristics (particularly the pressure drop) of the ethanol slurry are important parameters in various applications. Combined with the two-fluid model based on particle phase dynamics proposed by Gidaspow, changes in the flow rate and pressure drop of an ethanol slurry flow with solid phase fraction in a horizontal straight pipe were studied using FLUENT. When the flow rate increased from 0.51 m/s to 0.92 m/s, the pressure drop increased from 5.184 kPa/m to 63.707 kPa/m and the solid phase fraction changed from 10.4% to 30.5%. The model was consistent with the experimental observations; the average deviation between the experimental results and the numerical simulation was 12.8%. |
| Key words: cold thermal energy storage medium ethanol pressure drop characteristics solid-liquid two-phase system |
