降阻煤油石墨烯纳米流体制备及传热强化研究  

Preparation and Heat Transfer Enhancement of Resistance-Reducing Kerosene Graphene Nanofluids

作　　者：冯弦 于忻立 杜宗罡[1] 吴峰[2] 田靓 单世群[1] 邢钢[1] FENG Xian;YU Xinli;DU Zonggang;WU Feng;TIAN Liang;SHAN Shiqun;XING Gang(Xi'an Aerospace Propulsion Test Technique Institute,Xi'an Shaanxi 710100,China;School of Chemical Engineering,Northwest University,Xi'an Shaanxi 710069,China)

机构地区：[1]西安航天动力试验技术研究所,陕西西安710100 [2]西北大学化工学院,陕西西安710069

出　　处：《当代化工》2024年第11期2678-2682,共5页Contemporary Chemical Industry

摘　　要：降阻煤油在流动过程中存在传热恶化现象。为降低高聚物添加剂带来的传热热阻,在降阻煤油中添加高导热性的纳米石墨烯和分散剂制备稳定的纳米流体,并分别研究了分散剂种类和添加量以及石墨烯纳米颗粒添加量对纳米流体稳定性和传热性的影响规律。结果表明:油胺作为分散剂对纳米颗粒的分散效果优于聚乙烯吡咯烷酮,且当油胺添加质量分数大于2%时,可在15 d内维持纳米流体的均一状态,无分层现象。添加石墨烯纳米颗粒后的流体比热容和导热系数相较于降阻煤油本身均有提升,且在质量分数0.09%的石墨烯纳米颗粒添加量下,所形成的纳米流体比热容相比于降阻煤油提高了8.04%。当纳米颗粒质量分数为0.05%~0.60%时,纳米流体导热系数仅提高约2%。以传热系数为衡量标准,所形成的纳米流体相较于降阻煤油的传热系数增强了21%。There is heat transfer deterioration in the flow process of resistance-reducing kerosene.In order to reduce the heat transfer resistance caused by polymer additives,the stable nano-fluid was prepared by adding high thermal conductivity nano-graphite and dispersant into the resistance-reducing kerosene,and the effects of dispersant types and amounts,as well as the amount of graphene nanoparticles added,on the stability and heat transfer performance of nano-fluid were studied respectively.The experimental results showed that the dispersion effect of oleamine as a dispersant on nanoparticles was better than that of polyvinyl pyrrolidone,and when the mass fraction of oleamine added was greater than 2%,it could maintain a uniform state of the nano-fluid for 15 d without stratification phenomenon.The specific heat capacity and thermal conductivity of graphene nano-fluid were improved compared with the drag reducing kerosene itself,and the specific heat capacity of the nano-fluid formed by 0.09%graphene nanoparticles was increased by 8.04%compared with the resistance-reducing kerosene.Within the range of 0.05%to 0.60%of nanoparticles,the thermal conductivity of nano-fluid only increased by about 2%.Taking the heat transfer coefficient as the measurement standard,the heat transfer coefficient of nano-fluid was 21%higher than that of resistance-reducing kerosene.

关 键 词：超声处理 纳米流体 石墨烯 分散稳定性 传热强化 

分 类 号：TQ517[化学工程]