发动机冷却系统内纳米流体强化换热模拟  

Simulation of heat exchange enhancement using nanofluids in engine cooling system

作　　者：彭稳根[1] 刘元春[1] 胡彦伟[1] 何玉荣[1] 

机构地区：[1]哈尔滨工业大学能源科学与工程学院,哈尔滨150001

出　　处：《哈尔滨工业大学学报》2011年第1期109-113,共5页Journal of Harbin Institute of Technology

基　　金：教育部新世纪优秀人才支持计划(NCET-08-0159)

摘　　要：为了提高发动机的经济性、可靠性,研究了以纳米流体作为冷却系统内的新型高效换热工质时的传热效果.分别对水、TiO2纳米流体、Al2O3纳米流体和CuO纳米流体的冷却效果进行了模拟研究,得到了冷却系统的换热系数及压力分布图.研究结果表明:TiO2、Al2O3和CuO这3种纳米流体能显著提高发动机的散热性能,与水相比,三者的平均表面换热系数分别提升了10.82%、8.43%和11.24%,而泵功则分别只增加了1.06%、1.30%和1.98%.以纳米流体作为冷却介质时,能以很小的泵功损失增加量带来换热系数的大幅度提高,有利于增强冷却系统的换热.To improve the economical efficiency, reliability and miniaturization of engine, the cooling effects of water, TiO2 nanofluid, Al2O3 nanofluid and CuO nanofluid are investigated by simulation, and the distributions of heat transfer coefficiency and pressure of the cooling system are obtained. The results show that, compared to water, by using TiO2, Al2O3 and CuO nanofluid, the average surface heat transfer coefficient is increased by 10. 82%, 8.43% and 11.24%, and correspondingly the pump power is increased only by 1.06%, 1.30% and 1.98%, respectively. It is clear that the heat transfer coefficient increases significantly at a tiny loss of pump power with nanofluid as coolant, which is beneficial to the heat exchange of cooling system.

关 键 词：纳米流体 发动机冷却系统 强化传热 数值模拟 

分 类 号：TP242[自动化与计算机技术—检测技术与自动化装置]