水平直管内乙醇浆体流动压降数值模拟和实验研究  

Numerical Simulation and Experimental Study of Pressure Drop of Ethanol Slurry Flow in Horizontal Straight Pipe

作　　者：范肖雅 周黎旸 陈琪[3] 王树华 王斌辉 高如启 陈光明[3] 唐黎明[3] 金滔[3] Fan Xiaoya;Zhou Liyang;Chen Qi;Wang Shuhua;Wang Binhui;Gao Ruqi;Chen Guangming;Tang Liming;Jin Tao(Polytechnic Institute,Zhejiang University,Hangzhou,310015,China;JUHUA Group Corporation,Quzhou,324004,China;College of Energy Engineering,Zhejiang University,Hangzhou,310027,China)

机构地区：[1]浙江大学工程师学院,杭州310015 [2]巨化集团有限公司,衢州324004 [3]浙江大学能源工程学院,杭州310027

出　　处：《制冷学报》2023年第5期145-149,166,共6页Journal of Refrigeration

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%。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%.

关 键 词：蓄冷介质 乙醇 压降特性 固液两相 

分 类 号：TB611[一般工业技术—制冷工程] TB64[动力工程及工程热物理] TK02